As the person said above being polite and friendly is a good way to start. Your opening question How to approach!!!! Came over as pushy, rude and aggressive, using exclamation marks appropriately helps. Also taking a more friendly and polite tone when breaking the ice with someone you at interested in helps, being pushy and using exclamation points after sentences can be mistaken as aggressive or downright pushy. Show a genuine interest in the person you want to talk to, don't just jump in and expect cyber fun straight off either. Pushiness is unattractive to either sex
Say "Hi there. How are you?" or something rather than launching into teh sexy stuff. Check the guy's profiles for information that might help "break the ice". If he's a writer, check out his stories/poems. They may have clues to his interests.