hudfreegamer: With source ports, Quake and Quake 2 look better than Quake 3 (in my opinion). But, for multi-player, you'll like 3 most.
Quake 1 - atmospheric, dark, fast, challenging, single player.
Quake 2 - more story, slower, single player
Quake 3 - fast, multiplayer arena shooter (no traditional single player experience. You can play by yourself with bots though).
Quake, Quake 2 and Quake 3 have nothing in common. They should have been called something else completely.
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Unreal Tournament 2004 might be more what you want though. That's an arena shooter too (like Quake 3), but that has much better graphics and ragdoll physics.
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I recommend you watch a few youtube videos of each to see which appeals to you most.
Thanks. I ended up just getting the trio. I do have all the Unreal Series games that GOG offers.