As my recent dilemma over whether or not to upgrade to OS4-capable hardware has shown me, I'm a "retro gamer and hardware fetishist" :-) I love the classic hardware. The way the A4000 fits together is just beautiful. Big chunky Zorro cards, bolted-down accelerator boards, everything! I also like massively expanded A1200s. The idea of daisy-chaining more and more upgrades is quite fascinating (e.g. A1200 mobo -> Zorro expansion -> X-Surf -> Subway) but at the end of the day the stability and simplicity of the A4000 wins for me.
As for the games, I love to play all my old favourites. Not like I used to, when I was a teenager and would spend literally all day playing Cannon Fodder, Worms DC or Stardust with my best mate. But a quick play of those old favourites gives a nostalgia kick which can almost bring a tear to my eye - and that's why I still love the Amiga after all these years.
I think I would be more likely to use my Amiga as a main machine if it wasn't upstairs. Most of my computing is done in the lounge or in Uni so using my Amiga just isn't as practical as using my MacBook. If OS4 were to be patched to run under emulation or natively on a Mac, then I would definitely install it on my MacBook (under emulation) or on a G4 iBook (natively) and try to use it as a primary OS.
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moto