Vulcan raven in the tank and with his mini gun in the room with all the metal crates.The End in MGS3,this was a good boss battle.It wasnt as hard as people said it was or the game made it out to be.The ninja from MGS was also a good boss battle.Also revolver ocelot.
MGS bosses that sucked (except for the ones in MGS they were all pretty good)
Fortune - MGS2
Fatman - MGS2
The pain - MGS3
The Fear - MGS3
The Sorrow - MGS3 (he was kind of lame but not that bad)
The Joy - MGS3 (also known as the boss,The name is gay also and she sucked ass very weak end boss)
The vampire guy - MGS2
Solidus - MGS2 ( he was pretty lame as well.