good point gguruusa. Also, the name of the post which tells you what rom it is usually specifies which carrier it is for. If it doesn't say in the name of the post then it should in the first post. Some will work with all carriers only because the carrier specific items are taken out of the extended rom so they won't load on a hard reset.
This is a really post that has gathered most if not all the roms together for easy viewing. I don't really think its a coke vs. pepsi war kinda thing here. You will have users that like certain roms much better than other roms but thats because it suites their tastes (sorry for the bad pun) better.