Here are some of my times to add to the list or average in. I typically take longer to finish a game than most people. Also, with RPG’s I tend to do some of the side quests, but not all. For example in Final Fantasy X, I went after some of the characters' ultimate weapons, but not all. And in Baten Kaitos, I did the star map and animal side quests, but not the family tree one. That said, I'm guessing the hours listed below will be a bit on the higher side, but do not necessarily represent finishing the game 100%.
PS1
Final Fantasy 5 (Anthology) - 34
Final Fantasy 6 (Anthology) - 37
Final Fantasy 7 - 62
Final Fantasy 8 - 65
Final Fantasy 9 - 62
PS2
Baldur's Gate: Dark Alliance - 12
Castlevania: Lament of Innocence - 11
Final Fantasy X - 83
Final Fantasy X2 - 42
Metal Gear Solid 2 - 11
Ratchet & Clank - 26
Ratchet & Clank 2 - 25
GC
Baten Kaitos - 72
Star Fox Adventures - 18
PS1
Final Fantasy 5 (Anthology) - 34
Final Fantasy 6 (Anthology) - 37
Final Fantasy 7 - 62
Final Fantasy 8 - 65
Final Fantasy 9 - 62
PS2
Baldur's Gate: Dark Alliance - 12
Castlevania: Lament of Innocence - 11
Final Fantasy X - 83
Final Fantasy X2 - 42
Metal Gear Solid 2 - 11
Ratchet & Clank - 26
Ratchet & Clank 2 - 25
GC
Baten Kaitos - 72
Star Fox Adventures - 18