I need a headstart

Hi im new here in warmane... I was from Molten WoW (Cataclysm) but i think the server got hi-jack or something...

Well, i was thinking of someone could give me a headstart.
Like an info which server is nice to play and whats the difference between WotlK, Cata and Mists?

Thanks in advance for those that will reply.

And sorry if i post in the wrong section. :s

if you are talking about rates:
[wotlk] Lordaeron: x1
[wotlk] Icecrown: x7 experience, x3 gold and weapon skills, x1 profession and reputation rates
[wotlk] Blackrock: Instant 80 (only PvP)
[cata] Neltharion: x7 experience, x3 gold and weapon skills, x1 profession and reputation rates
[cata] Warsong: Instant 85 (only PvP)
[mop] Frostwolf: x7 experience, x3 gold and weapon skills, x1 profession and reputation rates

about bugs:
Wotlk realms are the better, almost bug free

Thanks @skullbashat!! i really need that comment ;)