Me, too. Hopefully they'll go into Bill's history a bit more over the next season, maybe even a little bit in the season finale! And by the way Bill responded to hearing Stan's name, there was probably a little history there, or maybe Stan happens to be very important or vital to something, maybe connected in some way to the Gravity Falls mystery, or just in the way of Bill's own unknown plans. Stan didn't really seem to know who Bill was when Dipper mentioned him, but he could have been pretending, or just old enough to forget. XD
I think I saw that interview, the reason Gravity Falls was picked out of Alex's three ideas was because he had a drawing of Grunkle Stan in his fez and the exec was interested in that.
It's pretty cool to see a show on Disney that has conspiracy theories, shriners, paranormal activity and illuminates.
I just can't wait to see more, I'm very excited for the season finale! And seeing more of Bill and the twins would definitely be interesting, but I'd also like to see an interaction between Bill and Stan, even if it's very, very brief. I'd just like to see how Stan reacts to Bill, see if he shows a little recognition or maybe just utter confusion. And I want to see Dipper and Mabel fight with Bill outside of someone's mind, if that is possible? Can Bill exist or do magic outside of someone's mind? When Gideon summoned Bill, I think Gideon went unconscious momentarily, so he could see and interact with Bill. If Bill can work outside of someone's mind, I'd like to see Dipper and Mabel use magic from they learned from 3 to fight against Bill.