I've owned 11 pins in total, and have 4 currently.
I have 3 now that will likely never leave (super mario bros, shaq attaq and monopoly), and then the final spot is my rotating game spot. I promised my wife that I would keep the collection limited to 4 pins for now, so that results in me usually selling or trading one to get another.
In fact I just traded a breakshot for a haunted house, and in a few months will maybe feel the need to trade/sell haunted house too. We shall see. northerndude , you know from our message conversation that I have a limited attention span with pins lol. I barely get one in the basement and I'm already keeping an eye out for the next one.

haha no worries, I know that my 'keep' list is a lot of peoples 'never buy to begin with' list. And that's ok.
I quite enjoy all 3. I think if you are only basing them on if they are super deep in code and game modes, then yes, they will rate poorly. But in my humble opinion, they are good, simple, easy, fun pins. I live in a small town. Most of my friends that I have over never play pinball outside of my place. My kids are 1.5, 5 and 7 years old. They're not looking for complex gameplay either. Each game has a fun theme, with light gameplay that to me make for a fun, relaxing experience. Most of my guests roll their eyes if I start explaining what to shoot for, how to start modes, etc. I'm sure eventually I will get some deeper, higher rated pins mixed in to my collection. But for now, these fit my friends, family and myself well.
Also, I was able to get all 3 under their suggested market values by a fair bit, so that was nice too.
I'm curious, have you played all 3 a fair bit, or more so going by pinside rankings? I'm asking as I don't want to assume that's the case. Just like you, I'm just wondering.
I should also note, that I have several friends that live about 2 hours away, who have very nice collections with lots of the top rated pins. So I'm able to experience a lot of the pins that budget wise I wouldn't go after myself for my own collection at the moment. I quite enjoy attack from mars, royal rumble, congo, elvis, bride of pinbot, etc. In fact, I haven't ran across too many pins that I don't enjoy, even if for just one small reason or another. Maybe that helps explain why I'm happy with the 4 I currently have lol.