I don't usually use presets, purely because I've hardly found anything that fits into my own music. Presets are usually too novelty and specific for my music. If I ever do find anything that's appropriate then I'm definitely gonna use it. If presets work with your music, then go ahead and use them. There are people out there who have a problem with producers using using them and think that it takes away from the integrity of the music but that's rubbish. It's about what you make, not how you make it.