When pet battles were first announced, I was pretty intrigued. I enjoyed collecting rare pets and mounts, and I usually had my my Kirin Tor Familiar or my Worg Pup out when I was running around. The idea of battling with them and getting even more pets was something I could get behind.
Then Mists of Pandaria came out, and there was always something else to do. I had do dailies, or do heroic dungeons, or raid, or do dailies on my tailoring alt so I could make Royal Satchels. It wasn't that I hated pet battles, it was just that I never seemed to have time for them.
Then patch 5.3 came out. I wasn't too thrilled with Battlefield Barrens, and you can only run Raid Finder Throne of Thunder so many times before it gets a little old. Thus, I decided to finally level that pandaren shaman that I had sitting in Westfall for months, and as I leveled her, I figured I might as well have her do some pet battles.