Honestly, I've done a couple of RPs in the casual section, and while they do tend to get attention, I still find it less enjoyable than advanced for a few reasons.  A. RPs there tend not to last long, not that they tend to last long anywhere, B. They can sometimes be too fast paced for me to enjoy because by the time I've written a post someone else posted, which makes me re-write my post, and C. It really does feel like advanced just has a higher standard of quality than casual.  Maybe I'm slightly elitist in that sense, but still.

I just like advanced better.  All of my best RP experiences so far on this website have come from the advanced section.