I'm at 87 hours right now and I'm pretty sure I'm sneaking up on the end. The only reason why I'm as far as I am right now is because I decided "fuck it" and forced myself to stop doing every single side mission I found.
I didn't want to stop.
Not sure what makes them so addictive and alluring...they're typically quite basic. Whenever I got bored with working on one, there was always another I could do for a bit. Sometimes doing that one would help me finish the other, and sometimes I'd go work on the storyline and an hour or two later find myself going right back to work on the sidequest anyway because FUCK leaving that sucker open.
From what I understand, it's 60hours even if you ignore the sidequests (which are largely optional and not required to beat the game), but I'd recommend trying them anyway because some interesting story background info seeps through the dialog in them.
Oh, and this game is so fucking choice. Europe didn't get Chrono Trigger, but they evened it out when they got Xenoblade while the US got the shaft. Easily among the top 5 jrps I've ever played, but its sheer length (twice as long as pretty much every other jrpg I've played) and my lack of time to replay games (aside from standbys like Half Life 2 and Duke Nukem 3D) ensures that this will probably be the only time I really get a chance to soak it all in.
Had this game came out during my high school/college years like Final Fantasy VI, I could totally see myself doing a subsequent run. Them were the days. Tons of time, few responsibilities. I played through FF6 multiple times back then. At least four. God, I wish I knew how many hours I put into it. I may have to play through that one again. It's been so long.