As far as good and bad times, I'm not 100% sure on that. I guess it might depend on their personality and their mood? When I get mine out and let him walk around a bit, he is usually out for about 10-15 minutes. I usually only let him out once every 1 - 1.5 weeks to walk around a lot. Sometimes I let him walk around on my arms and crawl up my shirt or onto my head, whatever/wherever he wants. Or sometimes I let him walk around on the ground and crawl up a blanket onto the couch or whatever he finds - just made sure I kept a good eye on him and never left him unattended. Never grab them to take them out - always let them come out on their own. You will frighten them if you just reach in and grab them.
What I USED to do... I would take my arm and lay it out straight, with only my pointer finger extended, like so:
http://www.officialpsds.com/images/thumbs/Hand-Pointing-Finger-psd100537.png
I'd lay that one finger on a branch kinda of near my chameleon, but not up in his face you know? I'd then lay a bug on my arm up near my elbow (I used any treat he likes such as a wax worm). His tongue couldn't get it from how far away he was, but I'd make sure he knew that insect was there. The only way to get it was to crawl out onto my hand/arm. The first few times I did this, He took like 5 minutes to come out. Even had a couple times he didn't come out at all. But once he does and he relates your arm and hand to food, he will start coming out more and more, till it gets to be every time. It got to a point with mine where he wouldn't even think about it... as soon as that finger was there and he saw that bug, it took less than 10 seconds.
Now the reason I say that's how I USED to do it is, because now every time he sees me, he knows "FOOD!!" and I don't have to lure him out. Most days during his feeding time, he will run to the front of his cage as soon as he sees me, regardless if I have the cup in my hand that I use to drop insects into his cage. It's the cutest shit ever. He literally will almost bolt to the front of the cage and like, stick his head out in my direction like he wants to come out. A few times a week, he will even run up the tallest vine in the cage, and scale the screen wall all the way over to my door, scale the screen on the door all the way to the top, and run to the end of the top of the cage door and stare at me like "I know you got dem crickets dude!"
Cracks me up sometimes. And I gotta let him crawl onto my hand to put him back into his cage when he is up on the door like that sometimes cuz the frame of the cage doesn't have a lot of grip since it's all smooth and all. Once in a while it takes him forever to figure out how to turn around and go back into the cage. But usually no matter where he runs to, as soon as he sees the insects in his cage, he ignores me and takes off to feed.
That's the lovin I get. ;-) Lol
But I love the little guy. Now he will come out onto my hand most of the time whenever I put my finger in there. He really does love me. Took quite a bit of time and patience for him to get there. But he did.
7 months old and I keep growing attached to him more and more each day.