What
@jajeanpierre said is SPOT ON. I have had my male veiled chameleon for a few months now. He also knows that I am the bringer of food and will tolerate me because of that. I like to fancy myself as someone who is very in tune with animals, and am able to bond with them quickly (I've been rescuing for years so that helps.) BUT these creatures are completely different. As someone said above the most you will likely get is trust, which is GREAT, but that is in no way a bond.. nor is it guaranteed. When my guy does come out of his enclosure into my hand, to get a once over (so I can make sure everything is okay with him) or so we can take a trip outside for some natural light, he appears to calm down but in reality I am sure he is quite nervous, and as I was once told on this forum, he is probably just waiting for me to eat him. Haha. It is true that most chameleons will become very stressed with continual handling and if you are seeking that type of relationship with an animal, I would advice (very nicely) to look elsewhere. Especially if you are seeking a mutual bond. There are even other types of reptiles that "enjoy" handling a great deal more than chameleons. (Just some food for thought.)
And if you are set on getting a chameleon I would advise (and this is just my opinion) to keep the handling to a minimum - mainly to check and make sure everything is okay, to move them to get some natural sunlight, etc. I do think building trust with the animal is very important, and they should be able to tolerate SOME MINIMAL HANDLING just to ensure that you are able to properly identify if something is wrong or to be able to retrieve them from their enclosure swiftly should they ever need medical attention. They are truly amazing little creatures who much prefer to be marveled at from afar.
I do think it is so great that you are here asking questions and researching chameleons prior to getting one as a pet. So many people impulse purchase animals and they get in over their head and the animal suffers. I commend you for taking the time to do your research in order to make an informed decision about whether or not you are ready to own one of these magnificent creatures.