I would like to see more designs from different companies that are not necessarily babyish but fun for those of us who lean more DL than AB. Rearz has the Seduction and Rebel which are not as babyish but wouldn't look off on an AB--though a bit goth but that doesn't turn me off.
Different colors would be nice--something that isn't just blah white or too medical-looking. Fun patterns are nice too. Before I had to go into diapers 24/7 I would wear--and I still use them as a basic diaper cover--colorful boxers with things like South Park, Superman, TMNT, Big Dog, and others. Now I'm not expecting licensed products but I'm all about fun and interesting designs or patterns.
I do think the people asking for more "girly" patterns and colors have a good point too.