Hahah, love the questions
1) Suzuki is the biggest, but you don't know how big exactly she is right now...
2) MC is average. The game will also have a few female characters so it can come in handy. But... it can be changed)
3) Love stomach bulge but it's hard to make in Koikatu. Not impossible, but hard.
As long as it's hot I'll do it though. It just won't appear often.
4) I have another game idea for RPGMaker but I want to focus on one thing at the time, so I physically forced myself to stop working on it. I might start it again in the future, but it's too far ahead to say anything.