If Main Street Theater were a color, it would be gray - mature, modest and refined. If it were a television network, it would be PBS, and if it were a kind of music, it would most certainly be classical music written before 1900. Main Street Theater is a fine theater company, one whose senses and sensibilities may not always match mine but one that consistently delivers exactly what it promises to people who seem to enjoy their time there. The theater's latest production, "Miss Bennet: Christmas at Pemberley," epitomizes the fact that I, a person of color under the age of 35, am clearly not Main Street Theater's target demographic.