I bought 9 retail versions, but only kept 5 of them. I sold the other 4 when I got them per PS+ as digital version.
I also rented some retail versions each for a week.
Digital games on my memory cards:
21 "full" games (4 bought, 3 won, 14 PS+)
31 "small" PSN games (18 bought, 13 PS+)
16 PSP games (15 bought, 1 PS+)
16 PS1 games (16 bought)
9 PS Mobile games (3 bought, 6 free)
9 PS Minis (3 bought, 6 free)
The next full game will be Tearaway, haven't decided if retail or digital.