I like both games a lot, and would probably tip my hat to Guitar Hero, but in my opinion the best rhythm series is the Ouendan Series.

DDR.

I run track, so I love using my feet
It also has a nice soundtrack.

Guitar Hero...well it's a lot less exciting for me and I get bored of playing rock songs that I don't even like all day.

I'm not really good at either, but I enjoyed Guitar Hero more.

i like guitar hero more!

Haven't tried GH and I own DDR, so my opinion is biased. Just looking at the two though, Guitar Hero LOOKS more interesting, but DDR looks more active and involved. I really enjoy DDR and perhaps I would feel the same way about GH. Anyone want to get me a copy+guitar? :-P

thats a pretty hard one actually...i like both of them xP but if i had to choose it would be DDR <--like the music in that one more

For sure Guitar Hero. DDR (no offense) is for girls.

OMG! I love Guitar Hero!!! DDR isn't as good but I still like it ^_^

i prefer guitar hero even tho iv never played ddr, i still go with gh

I prefer DDR, but Guitar Hero is pretty good.