Existing enchants will stay. All you level 19 rogues can keep your Crusaders and +15/25 agility =)
As for me, I've been playing this game since January. I have 2 level 60's, a Tauren Hunter and a Tauren Druid, both on the Alexstrasza server (PVE, USA). By far my favorite game in the world, even moreso when I started my Druid. I started my Druid in August and he now has 5/8 Tier 1, T2 Helm, and a bunch of other epic goodies.
I'm currently in between guilds, but as for progression, I've cleared all of Zul'Gurub, Molten Core, Ahn'Quiraji 20 man (except ayamiss), Onyxia and Blackwing Lair up to Broodlord. I can't wait for the expansion, and I hope to reach Nefarion in Blackwing Lair before it comes out.