I'm up for suggestions all the time. That being said there won't always be a guarantee that I'll do them due to lack of interest, time and skill (currently).
The only thing I'd ask is that your ideas have a lot of thought put into them and are special to you. That way there's more of a likelihood that I'll make the connection and have the willingness to draw something for you as a response : )
Feel free to toss me a suggestion in a dm. : )