I'm not sure about some of those C64 games, mate...
++ Senitel - an excellent game, but surely there's a better version than the C64's. It wasn't exactly king of the vector games. An ST version maybe?
++ Elite - don't bother with this game at all for the GP32. The game itself is amazing, but you just don't have enough buttons on the GP32 to control the game. Now, I HAVE played Elite: New Kind on the GBA, and it actually played very well. Unfortunately, whoever did the GP32 port ported from the PC original (where you have a full keyboard). Someone please port the GBA version!!!
++ Paradroid - a great game, but does anyone else have a problem with the sound - white noise running as a backing track that eventually fades out after a few minutes. Incidently - avoid Paradroid 90 on the ST. Risible, and you can barely make out what's going on - gaining control is way too difficult with the palette choice.
++ Sanxion - I don't recall this specific game, but I do remember having it in a 10 game compilation from Thalamus. It didn't get played very much as the other games in the set were so good. Delta was passable, but pounded into the ground by it's follow-up Armalyte (a very tough right to left side scroller). Hawkeye was also there. Que-dex and Hunter's Moon were also there.
++ Dropzone - a Defender clone of the highest quality.
I'd like to add Rainbow Islands, International Karate+ (the C64 is better than the ST, as the timing is more constant even if the balls incorrectly hit you occasionally) and Gyruss. I'd really like to say Chuckie Egg too, but it doesn't seem to work
Like centrlink, I'm investigating the ST scene at the moment. The ST had great graphics and sound without the bells and whistles of the Amiga, which makes it a better proposition for emulation. Xenon 2, Speedball 2, Dungeon Master, Civilization. There are loads of good games for it. I didn't have one as a kid (I had a C64 then a 286, and it has been PC all the way until I got my GP32 recently).