...in no particular order (and yes, some of these go waaaay back...)
--Lisa on "Green Acres," played by Eva Gabor...she was so ditzy and quirky, she cracked me up.
--Barney, played by Don Knotts, on "The Andy Griffith Show." Need you even ask why?
--The Virginian (I don't think they ever gave his name), played by James Drury, on "The Virginian." Mysterious...manly...you know, the strong, silent type --Al, played by Dean Stockwell, on "Quantum Leap." Not sure why...I just really liked him.
--Phyllis, played by Cloris Leachman, on "The Mary Tyler Moore Show." She made an art form out of being snobby and clueless at the same time.
--Herman Munster on "The Munsters," played by Fred Gwynne. Again, he was just funny...and he had that great, deep voice. The thought of monster as lovable goof...
--Emily, played by Suzanne Pleshette, on "The Bob Newhart Show." She was just a cool character...a pleasure to watch.
--David Addison, played by Bruce Willis, on "Moonlighting." His smart-aleck wise-cracking kept me watching, and promised his future stardom.
--Rob Petrie, played by Dick Van Dyke, on "The Dick Van Dyke Show." Again, no explanation needed--he's a legend. ...and more recently...
--Hugo "Hurley," played by Jorge Garcia, on "Lost." Hurley's down-to-earth sense of humor is one of the things that keeps the show from spiraling into inaccessible weirdness.
Dr. Jack Shepherd, played by Matthew Fox, on "Lost." I know a lot of viewers don't care for Jack, but I think he's the heart and soul of the show.
--Peter Petrelli, played by Milo Ventimiglia, on "Heroes." His basic goodness and likeability make him immensely appealing. For me, there could be no show without Peter.
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--Hank, played by Fred Ewanuick, on "Corner Gas." He's just so likably goofy!