I liked Turok 1! The gameplay was a little simple, a little rough around the edges, but it made up for it in the atmosphere and weapons! Part of the charm of the game was how bad the enemy AI was sometimes! And of course, the cheat codes for making the enemies dance and have huge heads were hilarious.
Turok 2 had much better-looking levels, I think. The level design was definitely more confusing, though. Really easy to get lost, or miss secrets, or accidently backtrack. The weapons were okay; some great ones, but some terrible ones too. The enemies were horrendously generic, even if the AI was decent.
Turok 3 I lost interest in during the first level, so I have no idea if it got better or worse from there.
So Turok 64 I could see getting on the virtual console. The other two, I couldn't care less. I'd never buy the other two.
