Do either of them ever try to get outside? If so, have they ever gotten far, and how do you stop them?
More or less, I'm asking you for advice on how to keep Sasquatch from becoming too much of an outdoor enthusiast. 
When Funcat was younger, he would try to go outside, but since he's older, he has less energy and doesn't really try to go out.
Gypsy is a travel kitty, so he doesn't mind the outdoors, but he doesn't really try to escape to go outside.
I guess the advice I would give you for Sasquatch(awesome name btw) is to really play with him a lot. He sounds like a very energetic kitty, like my little guy. :3 Or maybe you can train him to walk him if you and your fam have the time and patience for it.

I must say I don't have Gypsy outside walking a lot, but when I do, he enjoys it, until he hears cars and other loud noises. Poor guy.

You could always drug him with catnip.
Do Funcat and Gypsy like to command attention 24/7 or is it just my cat?
Oh, they both are attention hogs.

: Funcat cries for the attention and Gypsy usually rubs up against me so I can play or pay attention to him. The difference between the two is that Gypsy knows when I can't give him attention, but Funcat....he just persues until you give him the attention he wants.