I don't have any particular use cases in mind; mostly for use around the house. Right now the only flashlights I own are a ~10yo Minimag AA (lol) and iTP A3. Mostly looking for something to keep around the house that's a bit more powerful than my A3. Since I don't really need something portable I figured I'd look into something that has a bit better output. Then again, I don't exactly _need_ something crazy powerful either, so maybe this is all moot.
The S35/S65 are pretty interesting, but I think I like the size/output/price/warranty of the PA40W comparatively. Still leaning that way but keeping my eyes and ears open for other options!
My suggestion would be to keep it well under 200 lumen for around the house. My most powerful light is a Fenix TK15 and on Turbo (337 Lumen) it's WAY to powerful to use indoors for anything other than blinding an intruder (or myself in any other instance). It just totally kills your night vision. It's also too bright on that setting to use in my neighborhood (say for walking the dog), without pissing neighbors off, or again, blowing out your night vision. I've considered getting something brighter at times, but the uses become so limited I would rarely use them (spotlighting animals at night, tactical use, or pure novelty).
What I've found in the short time I've picked up this flashlight addiction is that I use the lowest settings around the house more than any others.
I can't comment on some of the other lights mentioned here, but I do have a lot of time spent with Fenix. I think there is a reason you see so much traffic about 1xAA and 2xAA on this forum. I have an LD10 (1xAA) that has become my go-to for around the house at night or early in the morning. While it maxes out around 100 lumen, I find that plenty bright for almost anything around the house. I have several much brighter lights and find I only use those outdoors. The next (AA) step up for me is my LD20 (2xAA) and the 180 lumen turbo on that is enough to light up any part of my very large back yard at night.
In fact, I just ordered my first Quark, the 1xAA Regular (R5) because of the moonlight mode that none of my other lights have. So while bright is great in some instances...it's not always what you need...
Not sure if I'm helping here, but that's what I've found via personal experience.