I like Roger Howarth. I just hate the characters he portrays. He played a professor in Gilmore Girls too (also unlikable). I think the roles he chooses says something about his personality. He must have a dark side. On the other hand, when someone plays a "goody-good" a lot of fans hate them too. Some viewers are drawn to villains like Stefano Dimera and James Stenbeck. They're the type who cheer for Darth Vader when they watch Star Wars. They admire the villain's strength, intelligence and conviction.
The actors I am surprised have lasted so long in daytime are Deidre Hall, John Aniston (on Days for 3x longer than his daughter was on Friends), Josh Taylor, Eric Braeden, and Melody Thomas Scott. When an actor is successful in daytime, there is a natural tendency to progress to prime time or the big screen. Those people I mentioned have either bucked this trend or were offered high enough salaries to keep them in daytime.