I love submarine games (Used to play
Subwar 2050 on my 486 and am now dabbling with
Silent Hunter II) and though Aquanox is beautiful to look at and maneuver through, I found the wingman chatter and "acting" to be horrible and quite intrusive. The interface isn't that great, either. The demo seems like it might be fun but I was annoyed after the first 5 minutes by the repetitive phrases my wingmen would screem into my ears. and haven't played it since. Also, the full game requires you to enter the CD-Key EVERY time you start it.
I'm sure I'll play it again as it really does look great with all the eye-candy turned up
What I can't wait for is
Deep Angel: Supercav (for Supercavitator). (Yes, I tend to lean towards FPS action-sub games.