I've noticed that a lot of large people fit on the R3 well.
Whereas, they look like a circus bear riding a tricycle on anything less massive.
One thing's for sure...once you are used to riding a Rocket, almost anything else seems small.
And that has been a very good thing for me. When I had a FJR, other feejer riders would say things about its weight, heaviness or size....I would laugh. It felt like a sport bike to me. Same/same with my S10...people say it's a heavy ADV bike but feels like a little dirt bike to me.