
My advice?
Stay away from "Cheers" (off the Common)
If you want to go there to say that you have been there, then....OK,...I guess.
Just don't expect the same service or friendliness as you see on TV!
Their PRIMARY business function is a Tourist Trap, their SECONDARY function is "Local" Pub!
IMO, there are other fine Pubs in Boston you can hang out with the locals and get more of Boston has to offer! In "Cheers", you get to talk with other tourists...hence the phrase "Tourist Trap".
IMO, the Irish pub called "The Burren", in Somerville, (A 'burb of Boston) is by far on of the best Pubs in the Boston area. Not touristy at all!
The Paul Revere house is kinda cool to visit.
The North End is also cool to visit, but becoming kinda touristy. (IMO)
The Duck Tour is cool during the Summer months, but I suggest getting tickets waaaaayyy before hand.
If you are into American history, then you have the Old North Church.
And if you want to venture further out, check out Lexington or Concord, MA!
Quincy Market? One giant Tourist Trap! (IMO) Good shops to look around, though, but most are now corporate driven. (Disney, The Gap, etc...)
New Engalnd Aquarium is very cool, but I hope you like standing endlessly in line waiting for tickets.

(Same goes for the Imax Theater, next door.)
StangVert00