Nothing against people who like playing them, but I personally am weary of playing against brooding, macho characters that are rude to most things they interact with. I won't say no to playing against them. Hell, I've seen it done really well, but more often I just get bored or my characters...
This is why I am up front before starting a roleplay what my activity level is. I'm an adult that cannot guarantee every day. At most, 3 - 4 times a week or less for 800+ word replies. There is no right/wrong activity level just preferences. You want someone to respond every single day? Be up...
Roleplayed out in the playground around 12 - 13. Around that time the same group of friends and I joined Gaia Online which is where we discovered forum roleplays. So around 13 - 14 officially.