I wasn't planning on picking up a PlayStation Vita, but then they told me there'd be a full-featured Uncharted game at launch, and welp.
Very happy that they are going to allow achievements account-wide. It will definitely help me towards playing different characters more often.
What achievement are you MOST proud of? Mine is still Loremaster, as it was pre-Cata, and took a very long time to do. Though once I get What a Long, Strange Trip It's Been in May for finishing Children's Week, that will be up there also.
Personally, my favorite achievement is Glory of the Ulduar Raider (10-man). It was the first time I had really been involved with progression raiding when it was relevant; we had a dedicated group, and we all worked hard to clear that place every week until we did it, and we were still up there in terms of timing. It was my first and really only experience raiding at that level. I've raided before, but not really with a purpose. I saw that rusted proto-drake and knew it had to be mine, so I did it.