I always like to get a strap to match each of my basses. I was kind of looking for something a tiny bit more 'rock and roll' than my usual, but found most of the straps on offer a bit too covered with skulls or crosses for my liking. Then I came across a guy on Etsy who makes nice straps to order, normally with tooled details on the strap (like bullet holes, patterns, etc). I asked him to make me a plain one and it came today, I'm really happy with it! Plain black, really nice leather, non adjustable (he'll make whatever length you want) and altogether great value.
Cheers
ped