I'm thinking of submitting a few of my best paintings
Are you looking for feedback on your best paintings?
No, I just want someone to appreciate my work.
As an artist, you should always submit your best work.  And you should want others to see and value the work that you've done.
No, I just want an ego stroke.
Well if you're looking to have your ego stroked the best way is by submitting the work you think will be most popular. They'll more likely resonate with more people who will in turn praise you.