I've heard along the few years I've existed that "You are your worst critic."
People always say their artwork is terrible, but to many people such as myself it's actually pretty good.
I do some artwork myself, and I'll say that I'm alright. Compared to people like @Polarnacht and @DizzyW I not that good, but that's because they have a lot of experience and practice. I fit better in the written work section along with @Mockingchu and @Shiny Blue Gardevoir .
I've learned from watching these people and others on this site as well that you should never doubt yourself and you should be proud of your work.
Good art! I think they're great! Especially #2 and #3, but maybe that's because I like images of people because I have a lot of trouble drawing people.