The only problem I had with the MGS collection was that it included MGS2 & 3 and MGS Peacewalker. I just really dont understand why 1 was not included. Same thing for the Silent Hill Collection. It had 2 & 3 but not part 1. DMC Collection at least has all 3 games. So the Rockstar Collection is great, its a huge download (32GB) it has LA Noire, Midnight Run, Red Dead Redemption, and GTA4 Liberty City Stories. Not sure why they gave you the add ons for GTA4 instead of the game, but I guess most everyone already owns GTA4.
MGS1 wasn't included because of the effort it would take to upscale a PS1 game is much greater than a PS2/PSP game.
@topic, Devil May Cry gets my vote. DMC2 still sucks, sure, but it saves the trouble of breaking out the PS2 if you want to play DMC1 or DMC3.
"In peace, vigilance. In war, victory. In death, sacrifice." ~ The Grey Wardens http://www.trueachievements.com/mygames.aspx?gamerid=71900