I think the prop recommendations by the engine manufacturers try to cover a lot of different conditions.
If you run the same prop on a 46 and a 61 you will get very different results. The 61 should turn the prop at a much higher rpm than the 46. Some areas have very tight noise regulations. A good bit of the noise our models make is prop noise. Running a big prop on a 46 will reduce rpm, which reduces exhaust noise and prop noise.

Your prop collection looks a lot like mine. I have practically every 12, 13, and 14 inch size that Master Airscrew and APC make; plus a good handful of 10 and 11 inchers.

After trying a bunch of props, I really only use 3 sizes:
.61 two stroke = 12x6
.70 four stroke = 13x6
.91 four stroke = 14x6
My planes are a trainer and some sport planes. The 6" pitch seems to be a decent compromise between speed and tyhrust for the way I like to fly.

In the end, you just have to keep swapping props until you find the one that suits you. Everyone else can point you to the one they like (see above) but you might hate it.