Do any of these games have online versions, or are these all physical, people in a group, board games?

They are physical, people in a group.

Some do have IOS versions now (it's a new market for them) but the idea is to be social.

There's a big site dedicated to it, Boardgamegeek.

This link is for my collection, to have a feel you can click on any game to get to it's page, which includes a lot of pictures.

Yeah, I´ve had a bad impression of the math problem in Power Grid. Although I like lots of other games which involve math more than average, for Power Grid I cannot stand it :-P

My busy schedule hasn't let play much of what I've bought.....I played Friday, which is a very, very good solitaire deckbuiding game, but still have to play a lot more....just played Village last week, it's a great worker placement game with a lot of interesting mechanics...and Walnut grove, anotehr worker placement which I liked a lot (but I'm still not sure why people were saying that it was a mix of Agricila and Carcassonne :-))....

Great site, thanks!

Eclipse. An outstanding 4X game.
I've also been playing ticket to ride via steam a lot recently - it is quite quick and I can leave and come bak to a session without loosing anything.
Twilight Struggle is a good game, but I can't play it if I'm tired!