My favorite male Trek actors... Robert Picardo might have to be my number one because I have a weird attachment to the Doctor. He's just awesome.
Besides Picardo, my other fave is Armin Shimerman. Patrick Stewart has to be there of course. My Garak, Andrew J. Robinson. And of course John de Lancie as Q.
I also love Avery Brooks, Leonard Nimoy, Tim Russ, Robert Duncan McNeill, Brent Spiner, Michael Dorn, Colm Meaney, and Rene Auberjonois.
George Takei is amazing for entirely different reasons. I just love him as a human.