#5: PC games drop in price very quickly compared to console games. i got COD4 for $35 on sale. it is $50 regular price.
#6: my 5 year old PC can still play new games well.
CoD: 1, 4, WaW (mostly on my clans freeze tag CoD4 server, with custom maps as of late)
MOH Allied Assault, mostly with the Spearhead and Breakthrough expansion packs.
MOH Pacific Assault