I think it's perfectly fine to use presets just as it's perfectly fine to use samples, as long as you're in some way either processing the preset or sample to make it less noticeable and more of your own. I use presets really often and then just adjust the perameters and it ends up as it's own thing. It's kind of like painting with a template or something like that, always nice to start with a little bit of something to give you inspiration and then you can branch off from it. I think in dance music presets are part of the culture anyhow ie. 303s, 808s, Rees bass, etc.etc.
Do what works for you! Just my opinion.