Yes, surely you want to a knob that you can grip firmly since it needs to endure a lot of tugging. Some people like to have knobs that are purely for decoration but I feel if you're going to take the time to screw it in, you should get as much use out of it as you can. Knobs can can if various widths, lengths, and styles so you should try out several different ones to see which will fit with your trim the best.

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Put me on wheels and I'll turn tricks.

Clever? Nah, I ran out of that years ago. But if you find this, let me know, k?
"The road goes ever on..." ~ Tolkien

In memory of my friend skip...
Go then, there are other worlds than these