I really enjoyed the first BK - never finished it tho (got really close, I forget what happened). I've never played the second - both of those are Gamecube games I'm looking to pick up.
Eye of Judgement was fun, but the camera stuff was unnecessary really and I never played it a ton because it was a pain to setup.
Phantasy Star Online Ep. III was an awesome card-based game too, and criminally overlooked IMO.