I remember getting a 10 Meg hard drive card and popping it into a slot on my PC clone. Man did I think I was cool.
My Dad thought he was hot stuff when he figured out how to plug his TI-60 into the TV set, and play "Pong".
If that didn't annoy my mother enough, he then went and bought the Speech Modulator to plug into the side of it, and he got great glee out of typing in phonetic swear words and fine tuning their pronunciations...