Morkus from Orkus
This was my experience with the one monk I have DM'd for so far. Didn't spam it, but used it a lot and especially in important situations.I mean, I have two games with Monks in right now. Both of them use Stunning Strike A LOT. Like, do they "spam it" by my normal definition of spam, i.e. use it every possible opportunity? No. Do they use it every possible sane opportunity when there's some kind of high-HD or otherwise threatening monster, especially a boss-type monster? Oh hell yeah.