Having "collected" things in the past, I think it's good to take stock of what you want out of life, and if you really want a hobby to consume all of your space, time, and money. At a certain point, having a lot of one thing becomes more of an obsession than something you do for joy. This is my experience. Yours may vary and I'm not passing judgment on anyone with a lot of games, obviously circumstances differ person to person.
Having a small selection of tables will at least let you widdle it down to the games you truly appreciate, or may encourage you to rotate games out more often. The advice I gave to a recent "new owner" of pinball was "Have one keeper, and make your 2nd game be one that you'll want to play and trade away."