Meeting MM at that recent Birmingham signing made me realise what a big part of the profession that fan interaction is, and how demanding it must be in some respects.
When I got there, the line was an hour long, and once I worked my way to the front there must have been at least as many people behind me as there had been at the start. But there was a genuine and warm personal interaction and conversation with every single person who went up to meet him, he seemed sincerely pleased to see everyone, and there was never any sense that it was 'part of the job'. It was more like friends with common interests having a chat.
The other great thing about that signing was seeing such a large diversity of people turning up. A really wide range of ages, race and gender, much moreso than you often see in my local comics shops. We talk a lot about the importance of diversity in comics, and it was great to see in the flesh exactly why that's so important.