Oh, hey. Sorry for the delay! :) I liked them all, to be honest. Tainted Donuts reminded me just why I loved Cowboy Bebop and Trigun so much back in tha' day, and Gratuitous Violets (cool name, btw) was suitably ass-kickin', as almost anything with the Major and Revy. I've still only seen GITS: SAC 1st GIG, which is rather shameful. I must sort that out this year. You can see the clear difference in budgets between Black Lagoon and SAC simply by noting that Revy rarely moves in any of the shots, while the Major is all kung-fu and crazy.
I'm a bit ambivalent on the Gurren Lagann AMV. Never really been a fan of the more comedy orientated AMVs, though a certain amount of parody for GL is apt. The Haruhi one was interesting-- this the first time I've actually seen any proper, in episode footage of the show, so it's definitely piqued my interest. Probably another one I'll have to watch later this year!
Some recommendations of my own:
http://uk.youtube.com/watch?v=OaXvyrQv_5M -- A fan-made trailer of Gankutsuou. If you haven't seen this series yet, you probably should have!
http://uk.youtube.com/watch?v=lPUxZ9SMXlc -- GMV of the last chapter of the Blame manga! Atmospheric and beautiful art.
http://uk.youtube.com/watch?v=w60qMrX_QXA -- Tekkonkinkreet. I love this anime and I think the video captures some of the beautiful art and emotion of the story.