Eh, like others said, once you find a niche role, either you choose to fill that, or Hollywood makes you.
God, its why Chris Tucker gets the part of whiny high-pitched black guy. You want to see sameness? Look at the plot of every single Steven Segal movie and tell me it isn't just a copy-&-paste of the last script. Coincidentally, its also why Eddie Murphy gets thrown into every horribad film being made since Pluto Nash.
Click doesn't quite fit into the original list. Personally I loved that movie, and while there was a good chunk of humor, there was a strong story behind it. Reign Over Me (and another film, can't remember it) don't portray him as some funny character, quite the opposite really.
As for the romance nit-pick? What movie doesn't have it? That's like complaining your water has hydrogen AND oxygen in it, or your food came with something to eat on top of the plate.