Gundato: Heh, I loved TA, but I absolutely hated pretty much every stock map.
For me, the fun was setting up WWI-esque stalemates and then slowly pushing through. And that needed chokepoints, of some form.
Sounds kind of lame, and I would get shredded in MP, but there is nothing more satisfying than advancing your units under cover of two or three Big Berthas (while the AI continually carpet bombs you).
Really? There were very few Cavedog maps I didn't like. I used to play every map. The only one that nobody played much was Yerrott Mountains, because it was so big it lagged like heck, and some of those pukey green gas planet ones with the floating plants, because those lagged a lot too. Thank goodness that broadband is not out of reach anymore, and computers are easily fast enough for a game like TA though.
Re: chokepoints -- You can make your own chokepoints with vehicles, defensive towers, and dragons teeth, too. Even with solars, in a pinch.
Sounds like you played mostly AI then and are thinking a lot about porcing (holing up in your base until you become unstoppable). TA was a great game in general, and I'm having a blast relearning maps and watching recorded games again, but the really outstanding thing was the multiplayer. After learning how to survive online, fighting even multiple AI's on hard becomes pretty easy.
Course, I'm more than ten years out of practice, so I suck now. I sure wish they would do this game all over again, changing almost nothing, but updating the graphics to sell it to a new generation. Best gaming experience I've ever had, by far.