i started when it first came out, even in the beta, and played up until lich king came out. so i think i played WoW about as long as a person has a right to. just kind of got tired of it after that. its not the same game i started out with and i'd probably suck at it now but for a while it was raiding every other night and pvp'ng on the other nights and grinding in between. and the occasional kiting teremus to SW so his AoE would kill innocent lowbies lol....good times
i had 6 lvl 70's i gave to my nephew. 3 horde (shammy, rogue, lock), 3 alliance (warrior, pally, mage). i think the old instances were the best with the exception of black temple and ssc. i dont know anything about the lich king instances though, so maybe those are the best now?
btw the whole sticking to just one faction is kind of dumb....if youre paying for a game why not enjoy all aspects of it? seriously, have you ever bought a pizza and say we can only eat every other slice? i've played both sides, neither are superior despite what anyone says. both have their plus and minuses. if you dont play horde then youre missing out on some cool quest lines and if you dont play ally then well...good for you...no seriously lol, there's some cool ally quest lines as well.
i do miss Blackheart in shadowlabs though. it was the one time could one shot a party member with my evil rogue lol. i miss my rogue too i guess