One reviewer compared "Gilligan's Island" favorably to "Lost". I concur. "Lost" is exciting, and I don't knock it, but they're always at each other's throats. "Gilligan" shows us that decent people marooned on a desert island can basically get along. They had their "Lost moments", but they respected each other enough to make up. This was elucidated so well in the Christmas episode by the Skipper/Santa Claus. This all despite the fact they were so diverse.
Like another, less fondly remembered 1960s sitcom, it is not the "Citizen Kane" of TV sitcoms, but it might be the Abbott and Costello of sitcoms (their movie Buck Privates destroyed Citizen Kane at the box office). It should be judged by A&C's standards, not Orson Welles'. You can appreciate it better if you don't take it too seriously, people! As has been noted on this site, "Gilligan" would have been renewed for a fourth season, as was expected, until CBS chairman William Paley intervened to save his favorite program, Gunsmoke, from imminent cancellation. Gunsmoke was falling in the ratings and seemed past its prime, while "Gilligan", which ran on a different night in each of its three seasons, was a consistent ratings winner, besting competition such as ABC's "The Donna Reed Show" and "The Lawrence Welk Show", and NBC's "Kentucky Jones" (Dennis Weaver quit "Gunsmoke" to star in that show) "Daniel Boone", and "The Monkees". But Mr. Paley spoke, Gunsmoke was moved to Monday nights, and instead of moving "Gilligan" yet again, it was sent packing. One consolation is that it has become one of the most successful rerun syndicated programs of all time. I doubt that Paley regretted letting "Gilligan" die, since "Gunsmoke" did bounce back in the ratings, but it was a scandal to treat such a beloved ratings winner as "Gilligan" so disrespectfully. Kennedy-era FCC chairman Newton Minow ("Gilligan" creator Sherwood Schwartz named the S.S. Minnow as a swipe at him) once called television a "vast wasteland". If TV was a vast wasteland in the 60s, in the 2000s it is a toxic waste dump, IMHO.