I use lip liner rather rarely - usually just when I really need my lips to last without touchups - so the PLW ones have become my major friends. They really do last like iron. The PLW liners have saved my butt many times.
Nightmoth is one of the best liners, ever, though! Plus one thing I like about the regular liners: you can sharpen them to a much finer point than the PLWs, which I really prefer, since I usually would rather liner the lips with a very fine line, if I'm only lining, rather than a heavier line I have to blend in.
For the heck of it, my 5 must have liners:
Dervish: this is my perfect lip color match, good under anything because of it - everyone should have a lip pencil that's their exact shade, imo - I also use Absolutely It PLW for the same reason, but that one adds a hint of brown, which is a shame, because I love the formula.)
Hip & Happy: this is the best color for removing excess brown from a lipstick shade. It takes all the hassle out of shades like Hot Chocolate.
Just My Type: Super dark cool brown - I'd rather use this than straight black for black lipsticks, which usually need liner. It's less harsh than black but is so cool toned, it doesn't add any red. I love it with my darkest purples as well, for the same reason.
Nightmoth: A real workhorse - goes with everything red and/or vampy. It does add red to purples and browns, though, so that's where Just My Type comes in.
High Energy PLW: For all my other reds and strong orange corals.
You can see from my list, I'm more inclined to line red, black and vampy colors, but will use a MLBB shade for anything else to add durability, rather than trying to match the lipstick itself. Plus Hip & Happy gets a TON of use, because it takes every brownish plum/mauve/rose lipstick I own out of the too-brown zone - it's the best perfecting color I own.