When i say "serious guild" i dont necessary mean guildes that have cleared naxx or aq40.
I've chosen to play a warrior up, despite my otherwise expirence.
I started out in the old days with a rogue like 50% of all vanilla players, which i started PVE'ing on, only mc at that time.
Later started raiding on both a paladin and a mage(mostly the mage) on al 'akir.
I raided for some time, did: MC, ZG, AQ20 and BWL which we cleared just before i stopped wow for some time.
Now i wanna make up for lost time and start raiding again, unfortunately i dont have any other raiding expirence (in the expansions.)
I really hope some guild needs a tank, even though it's probally the hardest class/spec to get into a guild with ^^
BTW i dont have anything against progress, but i dont want to wipe 20 times in MC cause i tried that allready :S
If the tanking thing is totally impossible, i also have a rogue.... again