Lemme tell you what's the best .. BOTH of them combined. Horror-comedy movies are awesome. Especially those with dark humor.
I think comedy movies are better then horror movies, comedy movies makes the person laugh while horror movies makes the person afraid.
I love both comedy and horror. So far, they are my favorite category of movies. For comedy movies, I had watched India, Korea, American, Hong Kong and etc. Different cultures have different way of representing them. Overall, I think all of them did a good job. However, for horror movies. I mostly prefer Thailand, Korea and Japan only. They did better jobs on frighten people out with ghosts or spirits. For English horror movies, I personally think that they are good with disgusting. For me, disgusting is a different story. I really not a big fan of disgusting movies. Furthermore, I award SAW as one of the most disgusting movies. Lastly, just minor complain to the horror movies. Recently, horror movies just focus on scary and forget about a good story line. That is what disappoint me in the horror movies.