Tell me about your trekking poles, please

Are you people trekking pole people? I'm not. When I've used them in the best, I didn't enjoy how clunky I felt using them. And on the steep hiking and scrambling I like, they felt cumbersome.

But I've been telling myself for years that I should try again. I'm particularly interested in the idea that trekking poles can increase hiking longevity as I get older and as my joints inevitably get worse and worse. 

If you're a trekking pole person, what are you using? Why?