My Ten favorite sitcoms of All-Time (in no particular order) are:

1. "I Love Lucy" (1951-1957)
2. "Laverne & Shirley" (1976-1983)
3. "Three's Company" (1977-1984)
4. "The Lucy Show"(1962-1968)
5. "The Brady Bunch" (1969-1974)
6. "Happy Days" (1974-1984)
7. "Bewitched" (1964-1972)
8. "The Munsters" (1964-1966)
9. "The Wonder Years" (1988-1993)
10. "I Dream of Jeannie" (1965-1970)

Beyond that:
11. "The Golden Girls" (1985-1992)
12. "The Jeffersons" (1975-1985)
13. "Sanford and Son" (1972-1977)
14. "Mary Tyler Moore" (1970-1977)
15. "The Dick Van Dyke Show" (1961-1966)
16. "Dennis the Menace" (1959-1963)
17. "Mister Ed" (1961-1966)
18. "Here's Lucy" (1968-1974)
19. "Mork and Mindy" (1978-1982)
20. "The Addams Family" (1964-1966)

NOTE: This list is subject to change