the best way of finding which clan is right for you is to go ingame and meet them.
some gangs are only online a certain time of day, so you want to make sure you actually have similar schedules.
but the main reason someone shouldn't go by the clans thread, is they can be out of date, misleading, or that gang could be a bunch of jerks or cheaters.
if you want to join a clan, go ingame and meet people.