Met Harrison once. Nice guy. He is my favorite actor so I went nuts in my attempt to meet him. Paid $300 for a ticket to a charity event he was chairman at plus $85 for a tux rental.
Was worth it though. Long story I'll share if anyone cares but I got one of only two pics with him and as far as I know the only autographs (at least in the time I saw him and I was there from the minute he arrived till the minute he left).
Anyway, signature was pretty much the same but a little nicer in person.