Let’s see…
I like XM-L2 in warmer tints and XP-L in cool because the tints on them look really good to me (the one neutral white XP-L I got is yellow with almost a dash of green, usable but not my cup of tea). XP-G2 makes for very nice beams on shallow smooth reflectors, gread flood/throw ratio, and at least from my experience, exceptionally pleasant NW tints. (Mind you, I only mean domed ones, I don’t have a single flat emitter. Heard good things about the tints on XP-L HI though.)
That’s all for me, really. I’m not interested in the spearhead of lumens and candela technology, my torch usage is 95% of the time under 40 lumens, and having slightly “outdated” items made cheaper from all the new developments is perfectly fine by me.