Yeah, I've drawn my entire life so I have pretty much experiences in all kinds of cateogries. I've only drawn manga for 4 years, so for example I have more experiences in drawing environments than manga ^^
It has to do with the web's copyright system, it sucks, ppl steal art anyway with a simple press on the PrtScn button. I can draw a manga character in 3-4 minutes, the coloring- and line-work takes about an hour or two. It's not a piece that requires a lot of time. And I can make a identical remake if I want to. But for ex an environment picture is consuming! I love making details (I draw it traditionally, not digitally). A piece like that can take one week or a month, and I don't want to upload a consuming work to get it stealed. I exhibit my artwork at shows.