I never played FC1. FC2 I enjoyed but a lot of people didn't. The biggest gripes seemed to be that roads had a checkpoint every six feet and each checkpoint would have 4-6 guys in it and would respawn the second you left its aggro radius. So 80% of the game was fighting your way past checkpoints. Oh, and fast travel was pretty limited so you spent a lot of time driving past checkpoints.
is far cry 1 and 2 worth it?
I usually enjoyed the combat so that wasn't a huge deal for me but some people complained of AI quirks like cover/stealth not working properly or one guys spotting you and every enemy in the camp knowing where you were.
On the plus side, I liked the weapons and, as I said, I liked the combat most of the time. Fire physics were a lot of fun. The scenery was great. Missions would have two ways of doing them: the way the "bad guys" you were working for wanted you to do them and then some alternate route your "allies" would want you to take. I thought it was worthwhile playing, anyway.
[Edit: If someone has a DOTA key or invite, I have a friend on another forum who would like one. No pressure of course but I know some people have found them to clutter up their inventories.]