I think I took a month each for Etrian Odyssey 1 and 2, putting 100+ hours in each. Final Fantasy 8 took me a month at 108 hours with 100% completion (every card, every blue magic etc.). Secret of Mana was one I played at least once a year, and the last time I played it, it took my about 7 hours. I tried to play it on the Wii, and I was no longer as fast at it. Strange Journey I think I've been playing for a year, and I'm at 74 hours. I forget how many hours my last FF7 play-through was, but it was around 65 hours, including getting KotR and killing the weapons. I don't remember FF1,2,3,5 much at all, because I just blazed through them. Would have been the same with FF4 and 6, but I went back and l played those two again, cause I liked them enough.
When I was in school still, I had a lot more time to play. I mean, I logged like 180+ days on FFXI... Now, because of cooking, cleaning, pets, jobs, etc, it takes me forever to finish even short games.