If you see Hetzer, tell him I miss him.
Titans Of Steel is unfortunately not as complex as it looks, but good fun anyway.
The Mechdesigning itself is very well done, and nearly limitless. Though if you gain half a year experience (or play once against the real pros), you find that there are only a few choices how to sensibly configure your Titans, and then its still down to terribly randomness, especially if both sides have newbie jockeys...
Things I still play: King Of Dragonpass (every now and then), Morrowind (one of my main characters has an extensive library, and I like to read those books
), Diablo 2 (though I much prefer the atmosphere and story of Diablo 1, but my girlfriend only wants to play D2...) and System Shock 2 in a multiplayer campaign. I consider getting Warlords IV, despite the bad critics and despite the terrible user interface I've seen in the demo (for the sake of gods, you can't deactivate a group in a city, so that when you cycle to your next unmoved unit, it will always pop up... hope that gets fixed in a patch, blech...), because I loved Warlords III dearly and can't get it running under WinXP... *sigh*