How many hours did you have once you finished the game?  I wanna get an average for the ending of the game... i'm only 17 hours in

im sitting at like 25 hours and only at chapter 10. I have heard that its about a 50 hour game with the sidequests in chapter 11

If I recall correctly, I was somewhere near 40 when I finished the game. I did a few sidequests, but for the most part just played through the game.

sidequests start in chapter 11?

thats just what I've heard.  
 
I'm not there yet. 

" sidequests start in chapter 11? "

i am at 77 hours right now, and have just got my first trapezohedron catalyst and created my first ultimate weapons. 
 
I finished the game at about 60 hours. 

I finished the game in almost exactly 50 hours. I didnt do any side missions, I spent maybe like 1 hour grinding in Teijins Tower.

55 and did some of the side missions. Still got alot more of those to go

54hrs and I did 20 hunts.

I did about 29 sidequests and finished the game with around 55 hours.

I finished the game at around 61 hours and got my S-rank. If you're not going for completing all 64 missions or collecting all the weapons and accessories you could probably finish in under 50 hours.

Finished in 40 hours, I think I was a little under leveled for the end though. I'm 60 hours in now rounding up all the side missions.

I finished in about 78 hours, currently I'm at 86.

Finished in 60 hours, now to do the missions above 30 and to farm.  On a side note those 60 hours were spent listening to Bombcast at all times but cutscenes.  You might think 50 hours of Jeff, Ryan, Brad and Vinny talking in 2 weeks is a bit much.  It's not.

About 36 hours. Didn't do any mob hunts or whatever, though.

About 50 hours or so to finish it, with all the lower level monster hunts done. Might be skewed a bit since I left the game running on the menu quite a bit.

55hours, currently at 70 and just got my first ultimate weapon, feels good breaking 1,000,000 damage finally.

42 hours to finish it. Did some side quest too, not that many tho.

I clocked about 48 hours, but I had to do some grinding to beat the boss for chapter 11 and I did very few side quests.

Figure I may as well post my time. Had no home work last night so I finally found time to play it and win, final time was roughly 33 hours. Only did a handful of optional missions, otherwise I was going through the story.