Strikingly if unconventionally handsome, Sheffer has had a spotty film career but tends to shine in TV-movies and miniseries. While appealing as affable "himbos" ("Babycakes" CBS, 1989) and cut-rate Cassanovas ("Sleep With Me" 1994; "Bloodknot" Showtime, 1995), Sheffer may be best served by playing reckless charmers abetted by an unselfconscious sense of entitlement ("Some Kind of Wonderful" 1987; "A Season in Purgatory" CBS, 1996). With his straightforward naturalistic performance style, he veers toward the competent and amiable rather than the charismatic and compelling. This quality was