You can overcook beans? Don't tell my wife. Of course it's all about your personal taste and preference. Just remember refried beans are nothing more than pinto beans (we call them soup beans here) cooked previously that are mushed and refried. So even if the beans are a little overcooked (i.e. too mushy) you still have a filling meal.
We didn't get to try the chili beans recipe I mentioned before. Son had a ball game last night so not enough time. My wife did remind me of another of her recipes with beans though (along the lines of refried beans). No rice but you gotta try this. Fry some breakfast sausage; when it is done break it apart in the pan and add some scrambled eggs; cook until eggs are done; add some of your left over pinto beans (sorry my wife doesn't measure, she adds "about that much" to everything - with this concoction add about what you would eat as a serving times however many people are eating), mix it all together and continue stirring until the beans are warmed over to your liking. If it looks like dog food when it is done, you did it right, but man it is good (maybe I'm part hound dog). The best part, if there's no left over pinto beans we keep a stash of Luck's brand canned pinto beans on hand. Almost as good as homemade and does the trick every time. Sorry to stray from the topic (not by much) but had to share.