I'm addicted to the HE150 Pro, it's just the most overall pleasant earbud to listen to that I've heard except maybe my 1more E1008 which I baby, which is a bit similar, but the peizo offers a very distinct sparkle without any siblance I've heard nowhere else, I just baby it since I don't feel confident replacing the cable if it breaks!
I've had the smabat m2 pro with gold 150 ohm driver (very bright, made folk punk/alt rock too sibalent, even if it's the most technical detail I've heard from an earbud, nicehck mx500 diy (quite nice overall, excellent for the price),
qian69 (a previous favorite), qian39 (I need to order new ones, can't remember what they were like),
nicehck b40 (my favorite for relaxed listening, podcasts, youtube, anything with a chance of badly recorded and sibalent vocals, currently missing mine, it was my favorite nicehck and I'm sad it's disonctinued, the pk shell is my favorite),
monk plus (mediocre, overrated, worst cable in any earbud I've listened to),
smabat m0 with it's stock and the titanium dome 40 ohm driver (still not sure about this one, I like the shell comfort and DIY fun, but may need to play with tuning more, it has big potential)
It's odd, it seems I enjoy a slightly dark tonality in earbuds, but prefer neutral-bright in iems, both sound close in my opinion (dark earbud vs neutral-bright iem)
Any PK shell recommendations? I've of course got to get the Yincrow X6 given everyone's recommendations, the earpod style RW-100 is pleasant btw, I didn't listen to it a lot as it was a gift to a friend who prefers that style, but it was lovely and warm from what I did hear!