If this were a question of "If I hadn't gotten my start in BT, then what would it be...", then my answer would be card games and board games, including the stuff in the Wal-mart toy aisle. That's what I grew up on. My grandmother was a master at Yahtze. My dad got me into RPGs for a short time, so I might have gone that way, too.
However, if this is a matter of "If it were to happen today, after all I've seen and done and been...", then my answer would be, I wouldn't give it up. I'd have to have amnesia to not recreate the game in some fashion, and I would do just that. I have plenty of starts in other games that I could fashion my own miniatures and everything.
I like the system too much to give it up, and I'm one that's been looking at ideas of my own, and helping people out with ideas of theirs.
There's just nothing else that compares.
If I had to go quick and dirty in the mean time, I'd probably go with some other giant robot game, like Heavy Gear or Jovian Chronicles, or even the new Robotech game... or the old Palladium one. I've been exposed to enough stuff that I have lots of fall-back options when I'm bored. Even card games like Magic: The Gathering. Yes, I've dabbled in 40k and other games like it (Vor), and I've seen other hex-games like the Renegade Legion suite and OGRE and Leviathans. Still look at new stuff, too.
But, super tanks and flying battleships don't interest me as much as giant walking Avatars of destruction, especially ones that can take lots of hits and dish out lots of punishment in return.
The idea is now stuck in my head, I'd find a way to recreate it from scratch if I had to.