TL;DR What do you feel are the major benefits of the faction that you belong too? Why would you never faction change?
When i started out playing wow i only wanted to play horde. Back then none of my friends played and i was new so i didn't do many dungeons or play in any groups. After the game started becoming more popular my friends started leaving their older mmo's and coming to wow. Unfortunately they all wanted to play alliance and i was the only one who wanted to be horde so i did what at the time seemed unthinkable and faction changed to the alliance.
With the direction of cataclysm, blizzards focus on pvp and esports and the competition coming out soon pretty much all of my friends are leaving the game and now im left with a decision do i faction change back to the horde or stay alliance.
There are only a few reasons i can think of to stay alliance.
1. worgen Originally i was going to stay ally because i really liked where blizzard was going with worgen but decisions were made things needed to change and now im not sure this is a good reason.
2. Faction changes cost money. Sure it not a ton of money but moving 4 toons would cost me $100 bucks
3. some minor rep loses after the faction change
Right now i can think of many more reasons why i should go back to the horde.
1. Undercity this is easily my favorite place in the entire game and now its even better.
2. Tol barad i'm not big on pvp but on average it seems like the horde wins pvp objectives more often. With the new player cap changes i can imagine the horde is going to own this zone most of the time giving you more chances to do the dailies.
3. goblin trike is sweet i know this alone is a stupid reason but combined with the many other reasons it is a factor.
4. cataclysm is seeming like the horde expansion. I know this point is debatable and highly subjective and that for the most part the changes are balanced but without to much arguing i think everyone can admit the horde is getting a slightly larger update. Granted i think they need it since the last two expansions were seemingly the opposite.
5. the races of the horde are more appealing to me in my personal opinion
In the end maybe this is just another case of the grass is always greener but it just seems like this is the perfect time to migrate back where i have always felt like i should be. I just want to get people's honest opinions from both sides about what they wish they had from the other sides and most importantly what are the major benefits for you being in the faction you in.