Before DragonCon 2016 I had decided that I wanted to play Dungeons & Dragons at the convention. Even though I played D&D in high school and went to a lot of conventions where it was played, I had never actually played at a convention before.
In the early 80’s I played Dungeons and Dragons with my friends at lunch and on the weekends along with a bunch of other role playing games (RPG). Most of those games are not played very much anymore, but D&D is now on its 5th iteration which has apparently brought it closer to the first version which is what I remember.
At DragonCon I got to play 3 sessions, 2 of which were great and 1 of which was kind of meh. So much in an RPG depends upon the person running the game, the Game Master (GM) or Dungeon Master (DM), the player characters (PCs), and the module or adventure.
I tend to play “good” characters, with Lawful Good Human Paladins and Chaotic Good Elf Rangers being my preference, and in the convention setting that does not always work with the other players at the table. If everyone else is playing “not-so-good” characters like Warlocks, Thieves, Pirates, etcetera, a Lawful Good Paladin is kind of a stick-in-the-mud, which can actually be fun if the other players are into playing along, but it can also be really not fun if they want to play all serious. That last game at DragonCon was the latter.
Also keep in mind that I had not played since 1986 and never with anyone but friends. So at a convention with a hard time limit with a bunch of strangers was a very different experience.
D&D 5e is a lot like what I remember in high school, apparently previous versions, especially 3.5e, were a lot more complicated. Right now there are only a handful of books needed, actually you could play the game entirely for free using the Systems Reference Document (SRD).
If you are interested in playing D&D I highly recommend checking out gaming at a convention, it was a lot of fun and I was able to learn a lot about the fifth edition rules and how to play the game.