I don't think I have the right taste for this, haha.
♫ Dream Island Obsessional Park from Paranoia Agent. I don't think this'd make a very exciting deck necessarily, but I think the OP is really well designed and lovely.
♫ Starry Heavens from Tales of Symphonia. The animation from the OP of this game is probably the best in the series (unfortunately I'm not a fan of the UFOtable OVA.)
♫ Trigger from Zankyou no Terror. Hold the phone, I'm bringing more Shinichirou Watanabe and Yoko Kanno requests/suggestions. >.>
♫ TANK! from Cowboy Bebop, because classics.
♫ Stray from Wolf's Rain, because gorgeous.
♫ Overlap from Yu-Gi-Oh!. This is probably my favourite opening in the series.
♫ Warriors from Yu-Gi-Oh!. ... but I like this one too.
♫ Uninstall from Bokurano. I have a hard time imagining how to translate this OP into cards, but it's got some really lovely shots.
♫ Colors of the Heart from Blood+. Really really pretty. *-*
♫ Hit in the USA from BECK: Mongolian Chop Squad. This song gets into my head for months at a time, and makes me happy. :>