Keep in mind that if you increase viscosity, you will slow the high speed damping. That's not always good. See post #8 by 5Twins. That's what I do. Instead of filling with required ounces, I fill to about 130 mm from the top, with spring removed and tube compressed. I'm happy this way. I get less dive, especially braking. So, if you really want to get bucked in the hands, go to 15 or 20 wt and add a second brake to the front wheel.
Also, while experimenting with fork oil wt, don't change brands. Fork oil viscosity numbers aren't consistent between brands. I wish I could tell you where I got that info, but I can't. So, maybe this is just as well ignored. Common sense says, if you're using ATF, MMO, or engine oil, you'll have no point of reference for viscosity experimentation. Fork oil is made for forks. That's what I use. I picked Bel-Ray because that's what was available where I lived.