As I started the thread I feel entitled to go off topic - did you win the CP book? As for my own faves, I haven't played all that many wargames but still think Warmachine is great but lots of others run it close, like AT, LOTR etc. I really enjoyed the house rules for Flintloque too.
RPGs are more difficult, there's so many great ones. I'll always have a soft spot for WFRP, Judge Dredd, Paranoia and Dragon Warriors, because that's where I cut my teeth. Rolemaster probably has the best combat system, if you have a spare 3 hours to fight one orc and a supercomputer to work out the calcs...