My friend and I used to stand outside the BBC in Manchester on a Saturday morning to see the pop stars of the day coming out after a show that used to be live every week (the name escapes me, possibly Oxford Road Show). Duran Duran were a delight each time we saw them (and this was at the height of their fame). Spandau Ballet made sure that every single fan waiting got a photo/autograph - there were hundreds waiting so they allowed a manageable number of groups into the main reception area and spent time with everyone. Really lovely lads (the drummer was very flirty).
Toyah was also great - she came out to sign autographs and commented on my good choice of magazine (The Face). Depeche Mode did one at the end of the show, leaving knowing we'd all been waiting outside to see them
For work, I've met a few designers - Paul Costelloe, John Rocha and Jasper Conran, all of whom were friendly. Also met Rick Stein, seemed pretty quiet but very nice. Sir Stanley Matthews was an absolute sweetheart - he turned up unexpectedly to our (large and famous pottery company in Staffordshire) a couple of times. The first time, I was asked to go down to the showroom and sort him some discount in the store (he didn't ask and was very grateful). I never, ever ask for autographs but my (now ex) husband would have killed me if I'd not asked Sir Stanley. He did better than that, he took our home address and sent a personalised signed photograph to our home later that week. The second time I met him, we had a laugh and a joke about my team (Manchester United) and a chat about the (then newly built) Stoke City ground. He was just lovely.
We also had Sarah, Duchess of York visiting, very friendly and approachable. Also, Nicholas Parsons and John Inman (separate visits). Mr Parsons was very gentlemanly and professional. Mr Inman rang my colleague to chase up his fee then rang her a few days later to thank her for sending it.
A friend of mine in Cornwall takes small groups of people on tours of the county. He took one group into a (lovely, tiny) pub in Zennor (a tiny village just outside of St Ives) and was told by the manager they were expecting a famous actress and they must not speak to, look at or acknowledge her at all (and this pub is tiny, so that would be quite difficult). Anyway, in walks Dame Judy Dench and, as instructed, my friend's party ignored her. One of the group had a bad back and went to warm himself in front of the log fire. Dame Judy looked up and commiserated with him on his aches and pains and thereafter followed a very long chat about their various ailments - apparently, she couldn't have been more down to earth or lovelier.
I saw Lenny Henry at a book signing in Lewis's in Manchester about 20 years ago (I hadn't known he was there, I was walking through the store on my lunch break). He looked miserable as sin, really grumpy and that was when he'd just walked in and sat down! Have never liked him since.
Sir Bobby Charlton - went to his book signing in WH Smith's in Manchester Arndale about 6 or so years ago. He turned up about 15 minutes late, was in a very grumpy mood (no smiling, just not friendly). Staff came along the queue to inform us he'd told them he would be finishing on the dot, despite being late. It was clear the staff felt very awkward. He barely looked up when signing the books either. I wasn't impressed. Gordon Ramsey on the other hand stayed at least an hour after his book signing should have finished, top fella, really friendly and had a word for everyone.
Aussie comedian Jim Jeffries is another top fella. Always, always stays behind to meet fans and have photos taken. Russell Brand was the same, and Jason Manford.
Finally, my mother ran smack bang into David Beckham when walking into M&S in Manchester as he was walking out - bags flew everywhere (so she says). He picked all the bags up, made sure she was alright and apologised profusely. She said he was a real gent.