This is a post I made on another forum yesterday:
"I've been fishing crankbaits for 39 years, but I claim no expertise. However, there are countless brands, sizes, styles, shapes, colors, etc. that are productive.
I'd choose a few from brands whose names you know (you're off to a good start with the BPS) and make sure they run at the depths you want to fish. I don't place a high priority on color. Get a muted color like shad or bluegill and a loud one like firetiger and they will serve you well.
Don't buy too many. Use a few to get a better feel for using them and after awhile you'll know what else you want in your crankbait box.
Good luck. I generally throw cranks wherever the cover will permit and I think these lures have few equals in their ability to attract strikes."
I've seldom had conditions when I could actually bump the baits off bottom, but that's not necessary to catch fish. One of the things that bumping does is cause the lure to change speed and direction and that can be done with your arms, hands, rod and reel.
I believe everybody can benefit by having cranks in their arsenal.