1- C programming
2- Ocasinally Gfx (just drawn very basic sketch for a greenhouse yesterday with DPaintAGA). ImageFX has also been usefull to me couple of times too (finally installed it and converted a lot a IFFs to PNG). I've also got a bit into 3D Imagine (finally) and I liked it.
3- Mess with it! I just like AmigaOS and Classic Amiga hardware.
4- See AGA demos
5- Play old games
6- When I get a Networkcard it will also be ocasional webrowsing, now I mostly use a Win2K box with Firefox for that.