My mare is a bucker. She isn't in pain, her saddle fits... she used to buck to try and get you off because she learned that she could intimidate her old owners... now she bucks out of habit or if she's feeling really good or is in high spirits.
Anyway, as I said, she's a bucker... I've been thrown by her a few times because I lost my balance or she just took me by surprise, but I was thinking about her bucking earlier while riding (she bucked a few times on this ride, just so you know)... and I realized that her bucking doesn't phase me a bit anymore... I don't even bat an eye when she lets one go, no matter how big or small of a buck it is. I've gotten to where I can sit and ride a buck out extremely easily... and my girl bucks pretty hard most of the time, though, as I mentioned before, she's not doing it to get you off.
Surely it's not very good to be so used to riding out bucks that it doesn't even bother you anymore... I know that I should feel a little bit cautious whenever riding her, because of her bucking... but I can't... because I recognize it as just a part of her that I can't, or won't, change.