I could take any role if it's written truthfully and the behavior of the person is germane to the unfolding of the story. Some characters and some stories have to be told regardless of how distasteful they may be. I really can't think of something I would be unwilling to do. Nudity? Not a problem. Singing? I love it. Playing a really bad guy? It's always more fun especially for me because I like to think I'm a very kind and passive person in real life. It occurs to me that the only thing I struggle with is dancing. I've done it but I have to pour myself into the choreography to master the required moves. I look much prettier standing still. LOL. Maybe I'm just one of those persons who'll do anything for a paycheck.
I forgot to mention that I am related somehow to a real actor named Franchot Tone. He was in some good movies back in the 30's,40's,50's, and television in the 60's. He was married to Joan Crawford for a few years. His best role may have been 'Mutiny on the Bounty' (1935) He did The Twilight Zone, Wagon Train, Ben Casey, and some other 60's TV shows.
I would take any role. That is the fun. To see what you can stretch yourself to become. I don't mind sucking, if it means I am learning. So, I would take all roles. Except porn. I don't think that is really movie material.