I've had the same Louis Vuitton wallet for 16 years and wear it with every bag I own. One, because I'm lazy, two because the darn thing wears like iron. It looks new (for real!) with the exception of slight thread loosening at one fold, but you really can't notice it. Now that was a great investment!!
A LAMB wallet for the real stuff, but I do also have a textured turquoise Fumo in there with my LOTD, work badge, feminine products, transit tokens, extra change, and those little reward coupon-cards they give you at like, H&M or Shoppers if you spend too much money.
I have a patent agnès b wallet that I intend to use it with. I use "intend" because my Rocco in Rose Gold is now transiting and on the way to me in Singapore. It is nice to match the wallet and the bag but I don't feel like I have to. I realize I am a sucker for black and metalware. No surprised why I got the Rocco there :)