My question is: can anyone give me a good ratio of nuts to fruit and/or chocolate when creating your own snack mix?

I enjoy the mixes that you can buy but would like to make my own. I can't seem to get the proportions right. I like those with nuts and fruit, somehow chocolate doesn't seem like a good fit in those that I've tried. I'd like to use something like salted pecans, almonds, dried cherries, maybe some pistachios or walnuts? Anyone have a good rule of thumb for the correct ratio? Anyone have any combinations that they especially love?