That sounds cool Morphine. I think there's alot to be learned from all of these 'alternate gameplay' maps you find out there. The other day, I played some map for HL2DM that was basically football. There was a glowing green purse model, that you had to grab and run into the other team 'inzone' to score. It was super fun.... made me want to come up with something crazy. I'm tired of normal DM mapping at the moment - I guess I've hit a point where I want more challenge. (not saying there's no challenge in DM mapping... I just want different puzzles to solve). This is why I've been playing with singleplayer mapping. I'm having a ball with that.
Ok, favorite HL1 maps.
Well, I'm going to include OP4 in this as well. OP4_Park, was my alltime favorite large map. This map had great visual appeal, great layout, lots of gameplay depth, and a cool gimick with the train. Truly Awesome.
I have to vote for Gasworks, aslo. I played that map almost exclusively for a year.
The map that inspired me to really start mapping, was Powercore. God, I remember that map having so much personality and was so intricately crafted. That was the first map I decompiled and inspected. I was blown away by how precise and cleanly built everything was.
Anyway.... can't really pick a king. So many good maps out there.