For all their flashy contributions, costume designers are some of the easiest theater people to overlook. But just as clothes can make the man, so too can the right costumes make the show. This season we've been particularly impressed with the work of MaryJo Alexander at Actors' Summit, a small but professional theater in Hudson. More than mere accessories, Alexander's costumes are often integral to the production, as when they fleshed out personalities in All in the Timing. They're not skimpy either. If anything, she has a taste for the lavish. Recall the ornately attired cast of Shakespeare's A Midsummer Night's Dream. But no matter what the play, Alexander's costume designs ensure that the actors are as much fun to look at as they are to watch.