I think Popjustice is okay as you can have good, serious discussions on music but overall I prefer ATRL as it's more fun, diverse and there a lot of funny members here.
How do you put up a poll on here?
The options are ATRL, Buzzjack, UKMix, Popjustice, Breathe Heavy and other music forums you know.
(I'm only closing this because we advocate avoiding active competition between ourselves and other sites; you're free to discuss the topic in Random Thoughts)