there is a terrible lack of rincewind and granny weatherwax in your recommendations

i would go with
small gods
guards! guards!
wyrd sisters
lords and ladies
interesting times
going postal
making money
night watch
the fifth elephant
eric
carpe jugulum
moving pictures
reaper man (the only death one i really liked)
i really didn't like soul music, sourcery, mort, monstrous regiment or masquerade
hated pyramids and equal rites
thought i loved the color of magic and the light fantastic but they feel almost TOO douglas adamsy -- good douglas adams, mind you, but still very derivative
although rincewind uber alles
the rest are all good fun