I am intending to start Alliance on the new PvE server when it starts. I was Whitebull of Hellscream way back in the day. We were a fairly advanced horde PvE and PvP guild. I intend to play druid and played druid in the past. I typically played feral, even way-back. I had a resto spec, but my guild's prot warrior tanks were less reliable than I was, so I had a lot of action as a tank. As soon as BC released I became a minor god, dominating PvE as a tank and PvP while still feral (arms warrior Threshwig as my partner). Fun times. I don't know how active I will be yet. I'm enjoying very-slowly leveling up a new char on Nostralius. I'm going alliance because all I played back then was horde. I am playing fairly lightly right this moment on Nostralius Begins. I would love to have friends to level with when the PvE server launches. I mostly just want a fresh server.
In terms of vanilla content my guild got up to C'thun but didn't kill him when it was progression. We also cleared mabye 5 naxrammus bosses. We were top Horde for our server, but people got burned out. When BC launched we got up to Vashj initially. I still remember that they nerfed Magtheridon at least once before we killed him (from 25 people having to touch the cubes to 20). We were middle of the road, though our guilds top players were competitive at international PvP arena things back then.