This question is mostly for hunters, but if you are not a hunter, please feel free to pretend you are a hunter and answer accordingly.
As you already know, patch 3.02, also known as "Echoes of Doom Doom do Doom Doom", will bring with it all those nifty changes to hunter pets' abilities and talents, in addition to doom. Beast Mastery hunters are even getting especially special pets in the form of Exotic Pets through their 51-talent point, called Beast Mastery. Some Beast Mastery hunters will not be getting the Beast Mastery talent, however, because they feel like the coolness of the pet plus a few extra pet talent points do not a worthy 51-talent point make. Other Beast Mastery hunters are just like, "WHOA! Did you see that friggin Core Hound?!" Still other Beast Mastery hunters find the booming sound of Exotic Pet footfalls far too loud, or for other reasons simply prefer normal pets: "Dude, I'm gonna get me a Gorilladin!" or "I've always seen myself as a Pink Flamingo Hunter, and now my hour of destiny has arrived at last!"
So what sorta pet are you gonna get? And why? I'm still undecided myself. I've always enjoyed my Owl most of all, but I'm not tremendously impressed with its new disarm skill in Wrath, since its usefulness seems too limited for my taste. The exotic pets are sometimes really nice looking (like the Spirit Beasts), but sometimes have too much of that "grumpy stompy" look (like Core Hounds) -- though I admit some of those abilities they have are very tempting. I might get used to them, or I might end up going with a Beast Mastery talent build without the Beast Mastery talent, in order to have a wider selection of pets to choose from (in addition to scatter shot). In fact, while writing this post, I just realized how utterly clueless I am about which pets I'll like best. I really have to try them out. Do you have some better idea of what you'll prefer?