On my BK9, I just finished the job that using it for several years started.
Same knife after a few hours work:
I also found that stripping it noticeably helped make it more "slippery" batoning through wood.
On my newest BK2, I really didn't have any plans to strip or polish it when I ordered it, but I did plan on trying my hand at putting a convex edge on it. The 2 has a saber grind, which means the blade has a steady bevel angle ground on each side from the top of the grind down to the edge, and the hand-sanding technique I used for convexing, lent itself to laying the blade flat on a leather strop mounted on a piece of board and wrapped with wet/dry sandpaper, and then applying a circular motion and pressure. I didn't "strip" that blade as much as just lost the coating to the technique I used to convex it, but it came out looking better than I could've ever imagined even if I had planned on doing it.
There are functional, as well as aesthetic, reasons to strip and/or polish a blade. Polishing is just a hair below coating in resisting rust. I haven't seen so much as a speck of rust on either of mine that I've polished. I do coat the 9 with oil because it's only polished to a satin finish, but the 2 I haven't put anything on its mirrored finish at all, and still have never seen any sign of rust.
But hey, it's all about personal preference. If someone likes how my 9 looked before I stripped and polished it, cool man. There is no right or wrong thing to do in this regard, as long as you do to your knives what you want to do, even if it's nothing.
Blues