I haven't been active on the forums for a while mainly due to being in India for quite some time. I'm returning back to the UK this Friday and I'm very eager to jump straight into the new expansion. Anything in particular you guys could share in things to avoid, things that are a must-see, any known issues which cause persistent problems etc. etc.
I'll be continuing with my Monk (see signature for armoury).
Not too much to say, except welcome back! Garrisons are cool, the levelling is cool, the new models are cool, nothing really game breaking or just super shitty in general off the top of my head. Shaman DPS is really undertuned but that's getting fixed before raids open so that's fine. Raids don't open until Tuesday so most likely most of the big glaring issues with dps tuning and itemization and junk won't be revealed until then.
If you played Mists and was disappointed, give WoD a try, it returns more to the old-school gameplay. Other than that, do the same thing you've been doing since you started playing: have fun!