Here's mine.
Commodore Amiga/CD32 being sold to Escom and then onto Gateway etc.... Then dying altogether. Possibly my saddest moment.
My 4mb Voodoo card dying.

*however was replaced with 2x12mb VoodooII SLI goodness

*
3Dfx going **** up.
nVidia driver hell. *still have this. Can I have one set that just works with everything please?*
Troika Games going **** up.
Half Life 2 *Was expecting something good. Sadly disapointed*
Battlefield Vietnam/2/2142 *Was expecting an improvement over BF1942*
Desert Combat *Was fun for a while...until they got Capture the flag working and it all went to hell as CTF is cack in DC*
Xen in Half Life
No more Geoff Crammond Grand Prix games
Oh... and worst of all... The current poor quality of games being all style over content. I'd rather have a game that looks like Elite but gives me enormous amounts of pleasure to play and satisfaction to complete. KOTOR is almost perfect in this - doesn't look that great, but is massively fun and huge!
Simon/~Flibster