That's a pretty rock! I like the mustard yellow brushstrokes.
Well there's no telling what people will think is interesting, but I can't imagine many that don't think naturally round rocks are pretty 'interesting'. For me, the more symmetrical the better. On this board we do 'try' and focus more on the geology of the specimen,ie; What is it? When, where, and how was it formed? What mineral(s) is it composed of? Once you paint the rock geologic discussion pretty much ends and you enter another category.
We're all 'noobs' at some point. Just a suggestion is you may want to start a thread for “Round Rocks”, (or some other title),  and continue your introduction collection down there in “What Did You Find” with your dragon egg thread?  You can keep adding to it as your collection grows, and we won't have to go far for any news about any egg developments.