We've had a percussion player in our covers band for the last year and I think it adds so much every band should have one!
I've always felt that a tambourine, shaker, guiro, wood block etc, can drive a rhythm as much as the whole drum kit, but have only just realised how effective after our percussionist quit and now it feels like something is missing.
Initially our percussion player was doing BVs but he was reasonably incompetent (I still don't know how that situation came about!), so to stop him singing I suggested percussion. He took it seriously, worked really hard at getting it sorted and it's morphed to where I couldn't imagine not having percussion in the band and I'm definitely going to have to find a replacement/persuade our old percussionist to come back.
Anyone feel the same way about percussion working in harmony with drums?