I only have:
Xeno 3 mode, XM-L T5 NW, which is nice on 14500s and decent on AAs
L3 Illuminations L10, XP-G2 4 mode, which isn't great on 14500s, but very nice on Eneloops.
Olight i3s 4 mode XP-G2, which isn't great on 10440s, but rocks on AAA Eneloops.
The latter two are very small and compact, but throw out a lot of light for their size. Plus, both have moonlight modes, where the Xeno doesn't.
I love my Xeno and it works well on a 14500, but it's a little longer and a little fatter than the L10.
The Olight is just so small, I don't know why more people don't put this on their keychain. It's really a flexible light for bedroom size spaces and smaller.
Chris