As someone who plays single-player games with a controller on a screen that is 165hz and G-Sync, 60fps feels really good and is my standard. If I set my cap at 90, it feels a little bit more smooth visually, but I don't feel any gain in responsiveness from my controller. If I set it to 120, I can maybe tell a 2-3% benefit over 90 in fast moving games like Doom. Generally speaking, it's not worth the added heat output, fan noise, electricity cost, etc. I typically run 60 and only bump up to 90 for first person games.
I think part of this is my brain/eyes not being sensitive enough to feel the difference between higher frame rates. The other part is I play single player games with a controller. Maybe if I were playing MP shooters with M&K, I would feel it more?