I don't like bracelets on Seiko divers, especially on vintage.
I think they should only be worn with a rubber strap.
Funny, I am the opposite. I really like bracelets. Seikos aren't the best, but I like the look and feel. Rubber is kinda cheap in my opinion on a modern diver. I also can't seem to dial them in just right on my wrist. Either it's too tight or too loose and the watch pops up off my wrist. Bracelets with the micro adjustments can be dialed in perfectly for my wrist.
But as far as vintages, yes, I agree, rubber look better. The SPB145, although vintage inspired, it is not, so bracelet for me! Plus, I can always swap out with a rubber if I find one that truly works for me.