Thanks again for all the advice, but I have one more question!
I've done some research and there is a lot of talk about how getting a raid spot as a tank is about as difficult as getting a raid spot as a warrior DPS, because of the sheer numbers of warriors, people finally succumbing to their warrior's destiny as a tank and guilds hand picking their tanks before anything else.
Is this true? Am I going to be a 5/10 man tank only? Or does the advice you all gave above apply to raiding as well? I have an odd schedule and raiding is possible but perhaps on more of a casual basis, unless I can find a early/mid morning server time raid guild... I know there is usually a lot of competition for MT, but how goes the life of a casual tank? I suppose I will always have pugs? I know I am a very good tank, and if it comes down to proving my worth I know I could do it. But as a casual I might have a harder road ahead.
I'd love to play as i like

But I could really use some piece of mind, even if it isn't what i want to hear.