I've been collecting autographs off-and-on for about 3 years,but I've never gotten very deep into the hobby(notice that this is my first post on this forum).So,I'd like to ask for some advice from the more experienced collectors on a subject I was wondering about:Among all the famous people out there,which ones are the very most generous toward autograph collectors?

are you asking about ttm or IP?
The lists vary quite a bit depending how you collect.

I'm talking about TTM.

Instead of writing to people just because they reply, write to someone you like and admire.

This. I know it might seem like finding celebrities willing to sign for you is hard work, and it is, but to put out a list of good TTM signers could mean that they will get spammed with requests. Not from huge fans--from people looking for an easy autograph. And I'm not saying you'd do this. You might just skim the list for people you like and there'd be no problem. It's just a bad idea in general to compose a list of good signers.

Just do your research--think of people you'd like to write to, and do a search for them on this site to see what kind of replies others have gotten. Compare them with IP examples to see if they're authentic, if that's important to you. Then, if/when you get a reply, it will be so much more satisfying since you actually took the time to seek out this celebrity you're a fan of.

as above

best thing you can do is to check the celeb you like/want write to and check there recent feedback
and be patient cause some can be quick and some ages depending how busy/famous they are
good luck

I definately agree!

Very good advice,and it is duly noted.