It’s tempting to award this title to Mary MacDonald Kerr, Jacque Troy or any of a wide selection of well-known Milwaukee actresses that turned in brilliant appearances this year, but the lesser-known Liz Mistele has arguably had a better 2010 than any actor in town. Mistele appeared in at least five shows in 12 months. Whether it’s a sparkling performance in the periphery of a Windfall Theatre production of Chekhov’s Three Sisters or an aggressive portrayal of a revolutionary dream figure in Soulstice Theatre’s Love Song, Mistele knows how to make her roles memorable.