I don't like the idea of Villas, the issue with playerhouses is they seem to take up a lot of data on the server, remember when guild houses came out, and it caused chaos when the server storage filled up? I don't see a reason to make something in between, as it seems pointless. Making something larger seems epic, but Stefan would probably end up charging like $20 for it because he can and people would buy it.
As for a larger selection of guild houses, I totally agree with this. Variety is great, and it overall is something that Classic has lacked variety of when there's 9000 hats and bodies and all that. I could probably make nice levels, but I doubt they would accept them-Xor really hates me, so he frowns upon anything I make.
As for public guild houses, heck yes! I want to be able to throw a huge party and have tons of random people come over, and just mess around. I loved doing this years ago, but it got boring when you had to keep spamming out invites and getting new people. I'm thinking even have the option to have it listed as an open GH, which is sorted in order of how crowded it is. I think they should raise the player cap to 50 as well, up from 25.