I like your D&D question but I'm going to wait to answer it until I can think of a really really good answer. Do you currently play? If so, what's your character like?
I try to play it with @ElmornSilverkin, a great friend of mine. In fact, Elmorn Phyllon den Silverkin is his character's name (a much more elaborated name than mine, "Daniel McFly", or sometimes "Ploo").
I usually try to be the Dungeon Master, but I completely fail at it, that's why I asked you if you have some tips. When I'm not the DM, I play as Ploo, a middle aged man whose name no one knows. He refers to himself as Ploo and avoids questions about his real name. He is an Elf Ranger (I always loved elves and bows). His father died when he was a kid, due to a small war between Frystes Lake (the village he is from) and some Orc tribes.
Ploo likes to think about the situation before acting, but sometimes he loses control and just goes for it. He also prefers not to call much attention, and sometimes he might act more like a rogue than a ranger.
Ploo doesn't have many friends, because he is not a really charismatic guy. He also does not rely on people. He was already betrayed once, and prefers not to talk about it.
And Daniel McFly is a NPC (Non-Player Character) that I sometimes use on some adventures. He doesn't really have a personality yet, I just think of what I would do on his place. He is a charismatic Elf Rogue.
I like to be the Dungeons Master because I can create adventures and places. I also like to create some new monsters and characters, and create their personalities. But when I was writing this answer I just felt like playing as Ploo, adventuring and thinking like him.
Damn, I have to play Dungeons and Dragons again.