I tend to like horror comedy the most when it knows which it really wants to be. For the most part I like horror comedy when you know it's a horror movie and the director is having fun within the genre, Evil Dead II and ANOES 3 being great examples. It's a lot rarer for me to find a comedy movie with horror elements in it that I really like. Movies like Shaun of the Dead and Zombieland and even Ghostbusters do it well, but for every movie like that there are about 5 Stan Helsings and Scary Movies. Also, horror heavy horror comedy can win me over a lot easier than comedy heavy films, they just come off as being more fun.