Yeah, Tim is an odd cat. So is just about everybody else that's been in this hobby for 30 years. There's some odd cats that have been in it 30 days, too. Pinball attracts characters. I could run a LONG list of them, starting with Guido DelSignore (I know he won't mind my mentioning his name), but it would be interpreted as criticism of very good and very odd guys, so I won't. What you have to do is to look at the guy's body of work, and Tim has a major pile of contributions and achievements.
If you want to take some guests there, try this...go over a few days in advance. Tell him your deal. Hand him $50 for the Salvation Army. Throw in a PBJ, he loves them.
In other words, treat him like a woman...give her money and feed her, it's all downhill from there