I'm not a fan of Toontown because Fantasyland already exists, and I don't mind being in land or going on the rides if I had a kid who wanted to. It is a good land that does cater to kids, but adults will at least tolerate well if not enjoy a little bit themselves. Toontown is only for kids and it seems like the majority of adults don't really enjoy being there at all. There is not nearly enough shade for one thing (it needs a lot more trees like Fantasyland has), and it's loud and kind of irritating. Roger Rabbit is fine, but the rest of the land seems to me to really only be geared towards kids and has nothing interesting for adults at all. Fortunately it is an easy land to ignore if you don't want to go there and don't have kids with you forcing you to go there.
I have never even walked through A Bugs Land let alone been on any of the rides so I can't really comment on that.