For me personally.........
if I find 3 strong games I like in one week, which is rare, but if I did, I'd pick the one that I thought was the best out of the 3.
I used to play all 3 in the past, but just like you mentioned, there are times where 2 out of the 3 lost. If I just stuck with one of those games, I would have either went 1-0 or 0-1. And going 0-1 is better than going 1-2 because of the juice tacked on to the loss.
Ofcourse you could go 2-1, and that would be better than picking one game and that one game going 0-1.
If you're thinking to yourself "I am an optimistic thinker so I'm going with all 3 games" That might seem fine, but in gambling, it won't make a difference. You could be Mother Teresa or the Grinch, you ultimately can't control what the players do on the field.
So the main point is that if you have a losing day and go 1-2, it's not as bad as going 0-1. And what's even worse about picking 3 games is that you could actually go 0-3 and have an absolutely horrible day. But if you stick with one game, you can't go worse than 0-1.
Ofcourse, again if you believe in positive thinking in gambling, and thinking you can beat the great odds and hit a 3-0 day, then you might want to think that over. I mean, if you really thought you could hit 3-0 most of the time whenever there are 3 strong games in one week, then you'd be playing the parlay. And we know how those turn out.
One more thing, when it comes down to it, take all this as a suggestion. Ultimately pick how many games you want. I don't want to be blamed if you picked one of those games and that game ends up losing and the other two ends up winning.
Goodluck to whatever you choose to do!