I started off with a Gottlieb Aquarius, then 2 more Gottliebs, then 2 more (all EMS).
Then, did a great swap with Extra Ball to get a Stern Nugent. Came across a Williams Flash. Manufacturers didn't matter -it was the games I was after.
I always wanted a manual ball loader. Came across a great Williams Riverboat (not to be confused with Riverboat Gambler).
Would gladly include a Bally into the family.
Yes, it is handy having one 'brand' for coils, spares, etc. But I put that convenience aside to have games I love playing.