Playing a charming psychopath, a frat boy, a wild-haired anarchist or a suave sophisticate, Regan Adair, 29, manages to bring to every role he plays a relaxed authenticity that makes his performances fascinating to watch. Trained as a fashion designer, Adair turned to acting four years ago and over the past few months has popped up in productions at half a dozen area theaters. He's onstage now at Dallas Theater Center playing Rosencrantz in Hamlet, one of the few local actors director Richard Hamburger personally has recruited for a role (DTC casts mostly out of NYC). It was Adair's riveting performance in Crave at the recent Festival of Independent Theaters that caught Hamburger's (and the critics') attention. One local director describes Adair as "a character actor trapped in an ingenue body." That's a nice way of saying he's immensely talented and really cute.