There is no "right" way to roleplay. Whatever method you're comfortable with is the one that's right for you. There are, however, ways to insure your roleplay is good roleplay, regardless of how you go about it.
Roleplaying isn’t really a solo activity – it’s about the interactions between your character and other characters.
When you roleplay, you’re pretending to be someone you’re not.
Roleplaying in World of Warcraft can be a lot of fun, whether it's random walk-up roleplay or roleplaying with a large group of friends.