Me too! I would like to see it happen with Ichigo and Chad though (the best friends that they are).I do really like the tension building up between the group. It would be nice to se a different group dynamic when no one trust no one, it would create for some interesting drama. I'm not arguing for some Sasuke traitor style, but if Orihime might go evil we will see where it leads.
What do they do all day? Well we do kind of see what Kuugo does all day. The bartender dude is kind of self-explanatory. The other two, who knows. And Riruka probably just hells at people all day long.
I think your right, Tsukishima does want to be a part of giving up his powers either. I do still think there's more to the whole "we give you our powers to get your shingami powers back" thing.