1. The use of flow charts to explain everything from mushy corn flakes to complex sociological phenomena only to run against a lightpost 5 minutes later
2. "Okay, so she smiled at me all night, did that think where she wraps a strand of hair around her finger and forced her phone number on me... do you think she could be interested?"
3. Usernames like "Einstein123", "Superbrain", "GeniusHere", "Superiormind", "Masterthinker" or a simple (and at least very direct and honest) "IRockTheRestOfTheWorldSucks" give a first impression of some members´ self-perception
All in all most NTs I know are awsome though.