They will simply tolerate your existence nearby them. But, as far as associating an affection, IMHO, chameleon is just not that kind of an animal, especially veiled.
A lot of people seems to associate a "bond" happened when the veiled automatically run to your hand when you open the cage.
but, i think it is far from affection and more likely the veiled see you as a mean to escape from the cage.
Another "affection" thing that people often talked about is when the chameleons rub their nose, head, or eye on the owner.
But, one member in this forum (i think her name is Kristina) brought up a very interesting theory that the chameleon simply sees you as a mobile tree.
Some chameleons also practice "death" bite on their owner.
Just like they do to trees sometimes.
my point is be very aware when you try to associate your chameleon with human emotions (or even worse, try to teach them human emotions)..
I do agree that veiled (or chameleon in general) is not a touchy feely animal
like dogs and cats.
but, I am not going to go to extremes saying that handling them is absolutely forbidden.
But be4 doing that, you should know some of the facts:
1. Chameleon do not enjoy such kind of affection. Handling regimens are
stressful to them. I always tell people to try see it in their chameleon's
perspectives. Chameleon sees every moving thing that is larger than them as
predator.
So, their feeling of a "handling regimen" will probably be the same like
yours when you are fondled by a big tiger

.
Some junior member once said "The handling will happened very rare
and it's just as a show and tell to all my friends."
That will probably stresses the chameleons even more.
the only thing worse than being fondled by a tiger is being fondled by a
tiger in front of other tigers.
2. Eventually your chameleon will get used to you. But, to reach to that point,
you don't exactly need to train them via handling regimen.
just the fact that you always show up to feed him and clean his cage is
sufficient enough.
3. Understand your chameleon's behavior. They are "programmed" to flee or
bite. Chameleons will try to run away until they are cornered.
Know the "i'm gonna bit you, if you don't back off" warning they exhibit.
Know these signs and you will be a happy chameleon owner.
I'll let you be the judge whether you still want to implement handling regimens.

hope that helps.