I reckon you'll be OK mate. Like yourself I have broken my Tibia which is the bone down the side of your leg next to the main one which is the fibia. I do full contact kickboxing and havent had a single problem with my legs. Apart from the odd cruciate strain but thats another story.
I also broke my hand very badly 3 years ago and havent had any problems with that either. And it was a bad break. I snapped a bone in my hand and dislocated the same bone from my wrist joint. The bone then turned through 90 degrees and stuck about 2cm out the top of my hand
I had to have the bone pinned to my wrist for 6 weeks. After a few months I couldnt even tell i'd broke it and now it feels perfectly normal.
Apparently, when a bone breaks it bonds back together and the bonding is supposed to be even stronger than the bone. This may be just a myth but i've heard it many many times.