Meet Gary Vaynerchuk, angel investor"I'm pissed about what I did with Twitter," Wine Library TV founder Gary Vaynerchuk tells The Deal in this video interview. Vaynerchuk regrets missing the opportunity to invest early in the venture-backed microblogging service despite being bullish on it. Eventually he bought some stock in the privately held company from an early holder of it but says he learned his lesson about angel investing. "I'm sitting pretty," says Vaynerchuk. "But I could be sitting obnoxious if I had acted on my intuition." Today, the colorful wine retailer and video blogger sports a startup portfolio that includes multimedia microblogging service Tumblr, picture-taking social network DailyBooth and location-based social networking game developer Gowalla.