I care a lot about location play, for many of the reasons already expressed. It's also a very convenient way to "test-drive" a particular title I might be interested in owning. It's also great to be able to play games I like, but not necessarily enough to own.
What I guess I didn't realize is how many of you reside in pinball "deserts" (a city the size of Atlanta really doesn't have at least one good arcade?!?). After reading this thread, I feel very fortunate to have a great location nearby (Cactus Jack's, OKC) and am emboldened to continue supporting and promoting it. Their older machines are always meticulously maintained and working 100%, and they seem to get every new game pretty much as soon as it's released (including AMH and WOZ); they also have a great selection of well-maintained classic vids which get my quarters too.
I also travel to the Colorado Springs area frequently and always make time for Arcade Amusements in Manitou Springs (perhaps the overall coolest arcade I've ever played - for many, would be ample reason alone to travel to the area).