I don't have really any least favorites, but I love many songs, such as Cartoon Heroes, Shades of Grey, Look to the Sky, BeForU, etc.

It's pretty hard to narrow it down to just a few favorites.  I pretty much love anything by TaQ, Ryu*, and BeForU.  I play Tears and DXY! pretty much every time I go an arcade (it's nice they're on both Extreme and SuperNOVA).

As for least favorites... I don't really know.  

There are a ton of songs across all of the DDR mixes so its hard to pick favorites. I really enjoy anything and everything by Paula Terry and dj nagureo. Asletics, Ebony Fay, NAOKI Underground, m-flo, and jun are some of my favorite artists who have songs on DDR. As a least favorite song I choose Sigrev2 by Richard Devine from ULTRAMIX 4. I can't stand this song at all . It's a good there there ar som many other songs to choose from!

There are lots of songs that I like from all DDR/DS series. Maybe, I'll choose fav, by version. But I'm just going to mention some of them (because mention all my fav will take me a lot of time)

4th Mix: BURNIN' THE FLOOR 

EXTREME: 1998/LOVESHINE/TLOM

From SuperNOVA1: Star Gate Heaven/PEACE (^^)v

From SuperNOVA2: Freeway Shuffle

Goodbye (^^)v

umm... i like some song but i like Sanae Shintani song soomuch because Sana is my favorite singer... :D

see you..

My favorite song in DDR, and trust me, this was a hard choice, is Trim. I like how it starts off as this ambient, atmospheric sound, and then the drums kick in. It is just plain nice overall. It is also one of the few hard 10 footer songs in the game I would actually listen to outside of playing the game.

My least favorite song is that cover of Faint on the arcade version of SuperNOVA 2. I just love that the rap part is talked out instead of, say, rapped. And the singing in the chorus is almost on par with Let Them Move.

well id say psmo for actual quality, speed over beetoven just because its ****ing speed over beethoven and max 300 max me oni is pretty fun i guess for a short list of favorites. 

least favorite song ever is xepher that file is like a konami took a **** on a ps2 disc and put it to some ****ty animu ******it song. 

AJmix you dont like LetThemMove? How can anyone not like LetThemMove?!? j/k I know that nearly everyone hates the song but I genuinely enjoy it. Its entertaining... or something like that.

Personally I like most of dj Taka's stuff like Freeway Shuffle, Leading Cyber, Logical Dash and Frozen Ray were good songs, there's also Spin The Disc, Pink Rose, and Burning Heat, I have more but they take a while to mention.

As for ones I hate, well the Slake stuff I don't like the songs just weren't catchy enough, aside from that I really don't have any other disliked songs.

Favorite:
Anything by 2MB

SySF

BeForU

NAOKI

...and many others (so many to name @_@)

Least Fav:
Faint - i thought "OH SNAP! LP!!" but i heard it and i was disappointed T__T
Any REALLY slow song (except for Bag)
Wind It Up...why? lol
...eh thats about it

Anything made by N.M.R is made of win to me... Celebrate Nite being my #1 favorite song in the entire DDR series.  Although I do have other favorites, but the list is just too long to name them all, lol. 

Anything Ryu*.  Hands down.

As for a favorite, Mondo Street is probably one of the most fun to play, being probably the hardest 8 in existence.

Least Favorite: DDR can do without Sean Paul - Get Busy and Temperature.  I'm sorry, but...no.  Just no. 

"Anything Ryu*.  HANDZ UP"

FIXED!!

My favourite songs are (for all PS2 versions): Rhythm and Police, Kakumei, B4U B4 ZA BEAT, Speed Over Beethoven, Love is Dreaminess though Xepher's very close, and Dragon Blade.

Forgetting Disney Channel Edition!  That one it's probably Doll right now though I suspect Exotic Ethnic will win once I've unlocked it.

Fav Song - Why Not.

Worst Song - Its Raining Men. 

Favorite song - Soul Crash

Least favorite song - uh, Orion.78 AMeuro I suppose. 

Favourite - Anything by NRG factory.

Least Favorite - Be in my Paradise after I black flagged it on the last jump. 

I like kobo's music... there's just something about it that I find soothing...

I don't know if there are any I really don't like though. 

My favorite songs are mostly classically-based ones like Kakumei and V and "Happy Hardcore" songs that get my blood pumping.  I particularly enjoy Candy*, Raspberry Heart, and Rainbow Rainbow.  Yeah, I know those aren't the songs that the cool kids like, and I can deal with that.

 I'm also fond of a few songs just for their oddball quality, for example Bag and Chaos. I love to see the expression on people's faces after I pass those.  And In The Navy '99 is gallopy fun - like bouncing on the bed!

The songs I don't like are things like Dynamite Rave, Can't Stop Falling In Love, and Burning the Floor - the music doesn't appeal to me, and they get played so much I'm sick of 'em and their remixes. (Yet I'm always glad for another Paranoia remix - go figure.) The only song I can think of offhand that I really hate is Oops I Did It Again. Plodding, boring, insipid song with plodding, boring, insipid steps.

I like anything pretty much by BeForU, TERRA, dj Taka, Ryu*, or anything "Happy Hardcore".

Hm. Well, I figure I'll pick a "DDR Original" here, and that would be Don't Stop (AMD 2nd Mix). Take a mediocre IIDX song and remix it to make such a great song with a fun chart. Love that DEEP house feel it has. 

hmm...favorite would have to be Innocence of Silence

least favorite is probably It's Raining Men as well.

Well, I don't know if I can pinpoint my single favorite, but at any moment, I'll have JaneJana, Innocence of Silence, Frozen Ray, and Butterfly in my head, humming as I do whatever it is i'm doing. YES BUTTERFLY BIG WHOOP, WANNA FIGHT ABOUT IT

Least Favorite is easily Love This Feelin'. It's the reason I didn't AA the DDRMAX game on PS2. 

Here, other songs that I really like from DDR/DS series:

FESTIVAL: KI.SE.KI (DDR edit)... I love that song!!!

MAX 2 AC: CANDY (vocal)

MAX AC: Firefly & MAX 300

EXTREME 2 (PS2): TOMORROW & PASSION OF LOVE

STR!KE (PS2): HEAVEN IS A PLACE ON EARTH (German Election Mix)

Dancing Stage SuperNOVA (PS2): Hoodie  

Favorite: Look to the Sky (True Color Mix)

Least favorite: Stoic (For Extreme)