Random BGs, transmog runs, and whatever achievements I can solo. I'm only short two rings and one trinket of being in full Prideful gear. Just grinding the rest of that out in BGs.
Funny enough, I was an active raider in one of my server's highest progressed guilds (which wasn't saying much...we were kinda like big fish in a small pond) from BC to the end of Cataclysm. After coming back in MoP from a one-year break, I'm suddenly all about PvP when I used to hate it.
One of my favorite things to do lately is stir up shit in contested areas to get some world PvP going. I don't gank lowbies, but I attack random Horde outposts, guards, etc. Eventually, someone my level decides to come out and get some.
I'm also still missing a few of the Wrath raid achievements and have been knocking a few of those out. Also trying to get Rivendare's Deathcharger from UD Strat....but yeah, been farming that thing for going on 6 years now, so I'm beginning to wonder if my luck is ever going to change.