HEHE, I am lucky that mine hate to leave their cage.
Of course they will let me and Joe pick them up and take them out, but I used to leave the cage door open all of the time and they would just stand in it and look out.
I take them out and play with as often as I can, but they only truly seem happy if they are in their cage.
They are weird little ones, they go nutty if you change anything in it, they have it just how they like it, so they throw a fit when I clean it, they will climb around on the bars for a few hours trying to figure out what has been moved... *sigh* silly little girls lol.
Hehe, so do ours. They'll run around their cage for a good 15 minutes at least after their cage has been cleaned. We made the mistake of putting something new in their cage a few months back and it took them about 2 months for them to finally realize it was 'ok' for them to climb on it and it wouldn't eat them!