Namor has always straddled the line of hero/villain/anti-hero. It's kind of tough to get a read on him because he shifts based on who is writing him. And to be honest, he's really done some things that you can't really come back from - like Dr Doom level. Under the Phoenix Force he flooded Wakanda, not to mention Atlantis Attacks and such. I do like him as a character but it's hard to see what they are doing with him and what his purpose is.