Meeting men I've previously only known on a computer is always a nerve-wracking experience for me, so going to this year's Adventure Convention was particularly daunting because I would meet the people behind the persona names en masse.
In my experience, unless I have got to know someone well enough to call them a friend, after face-to-face meetings, things are never the same back on the talkers.
I have therefore developed a rule of not meeting people while I am getting to know them and instead just relish in wanting to meet them.