I'm about 12 hours into FC3 and things are going well, at least gameplay wise. Shooting, driving, jumping, missions, everything has been improved from FC2. No stale missions yet which is excellent this far into a game. Thanks for the crafting advise, made things much better in the early going. I'm having a lot more fun than I did in FC2, and more fun that I usually have with this type of game. Similar to Sleeping Dogs, FC3 has my kind of pacing and the game leaves you alone to play as you like (mostly).
Only problems I'm having are technical. The frame rate is rough and slow-ish at times. Not game breaking, but enough to be annoying and cause me to restart some driving challenges (after a stutter faked me out and I crashed!). Sound is also wonky with certain effects, like engine sounds, coming out very muffled or fading completely. Gun sounds are sometimes very out of sync with your on screen action, the game needing to "catch up" sometimes. Are these typical Ubisoft things? Do the AC games have the same problems? I'm still having fun even with the annoying bugs. I might try a reinstall and see if that helps with general performance.
Overall, this is a really fun game that almost lives up to the hype that surrounds it. If you slept on this one then wake up and enjoy as it hits bargain price.