At first I got a GP32. I wanted to support it because it was not the popular shit but the community and homebrew development spirit was what I liked into it. And then I saw there was a small demoscene in it and thought it would be cool to try code some demos for it.
Later as the GP2X came out and saw the community moving to it, also thinking it's a better idea to support the new hardware with new software, I simply made the transition. I see also now that the demoscene in GP2X even if still small maybe will be more into it because GP2X is a bit more famous than it's predecesor (Several scene friends bought it when I showed it to them and some of my Linux freak friends too, funny they weren't interested about the emulators rather than that they can run sterm and do stuff! I don't remember any of my geek friends buying the GP32 when I first showed them that in the past. Now there is more interest for some reasons). Hopefully there will be a bigger demoscene in it even though sometimes I doubt it.
Well, there are few things I disliked in GP2X and I still discover I love my GP32 more.
For example I still play emulators on the GP32 because in the GP2X the batteries empty after 2+ hours. I have found myself enjoying emulators and homebrew games in GP32 for 5 hours or so while I only fire up an emulator on GP2X just to show to people what is possible. At least the GP2X has playable MAME, GBA, Amiga (Yum Yum!!!) and SNES that the GP32 didn't have but who cares when after 2 hours it all fades out (and maybe less if I need to overclock it in 266Mhz for these emulators to be a bit faster). So my GP32 is still my ultimate choice for Master System, NES, Gameboy, C64 even AtariST or Mega Drive which are impressive. Actually my great worry is why there was never a fast enough Amstrad CPC emulator in either GP32 or GP2X? When I moved to GP2X I thought, finally more processing power to see CPC (which didn't need that processing power to emulate) and they ported Caprice32 which was slower than Pituka instead of porting Pituka. Nobody cares about the CPC
I wish I had time to port Pituka or try to optimize what is there in GP32 or GP2X.
Oh I got out of subject.
So:
1) community
2) development
3) demos
4) emulators (I prefer GP32 for this still)
5) homebrew games (I like only few of them)