re: Is Cheers the best sitcom of all time?

It's ok. Has its moments.

My Top 85 or so would be:

The Honeymooners (Classic 39) Nothing comes even remotely close.

Dick Van Dyke
Andy Griffith
All In The Family
Seinfeld
Sanford and Son
I Love Lucy
My Three Sons

Mary Tyler Moore
Green Acres
Everybody Loves Raymond
Bob Newhart
I Dream Of Jeannie
Taxi
The Lucy Show
Gomer Pyle
Newhart

Barney Miller
Bewitched
The Big Bang Theory
Good Times
The Munsters
The Cosby Show
Here's Lucy
Leave It To Beaver
Gilligan's Island
The Brady Bunch
Frazier
The Flintsones
The Jetsons

Amos 'n Andy
Night Court
Maude
Petticoat Junction
The Beverly Hillbillies

McHale's Navy
That Girl
The Office
Mr Ed
Sgt Bilko
Everything's Sunny In Philadelphia
The Partridge Family
Laverne aned Shirley
Car 54 Where Are You?
The Courtship of Eddie's Father
Married With Children
Cheers
Soap
MASH
My Favorite Martian
WKRP In Cincinnati
It's About Time
Make Room For Daddy
Hogan's Heroes
30 Rock
F-Troop
The Golden Girls
Phyllis
Rhoda
Friends
Mama's Family
Burns and Allen

The Donna Reed Show
The Patty Duke Show
Room 222
Three's Company
Mork 'n Mindy
Bridget Loves Bernie
Happy Days
Coach
SCTV
Modern Family
Fawlty Towers
Mary Hartman Mary Hartman
Dennis The Menace
That 70's Show
The Addams Family
Hazel
Pete 'n Gladys
Welcome Back Kotter
Saved By the Bell
Family Affair
Family Ties
The Facts of Life
Too Close for Comfort
The Jeffersons
Dukes of Hazzard
Scrubs
Landlords
The Pruitts of Southampton
The Fresh Prince of Bellaire
The Nanny
Nanny and the Professor