I don't collect the Argent Tournament Alliance pets, being Horde it is very expensive and I could make an alliance alt to farm them but that just takes waaaay too much time. Or the more expensive TCG ebay pets.
I do plan to eventually get the really hard to farm pets (rep and drop) but for right now that's just too time consuming, I don't want to make the game I love into a job
But when I do farm... I don't stop. I spent 2 weeks straight in Outlands til I got the Nether ray fry, and a week on each whelpling I own. Not leaving the area for anything, not even dungeon queue. So you can see why I'm pushing it off, ONLY COLLECT IF IT MAKES YOU HAPPY! :3