Wondering if anyone has carried an Esee 3 or 4 for an edc blade and what is your opinion about it?
I EDC'd an ESEE-3 for several months. It's a great cutter. I retired it because it rusts easily anywhere the coating is damaged. If you actually use the knife, the coating will come off in places and it will rust. I also didn't like the absorbent handles, they seemed to get really grimy soaking up sweat. Lastly, the injection molded sheath looked and felt cheap. The knife itself was great, but it wasn't ideal as an EDC blade (for me).
If it fits your budget, the Emerson PUK is very similar in size and purpose, but made from 154CM stainless steel and it comes with the best kydex sheath I've ever seen on a production knife. It also has a grippy, but not too grippy, G10 handle. It isn't as good as a slicer as the ESEE-3, but only by a small margin. The PUK is much better at being ready on a belt, not rusting and looking nice in its epic sheath. The PUK is also way easier to sharpen thanks to the modified V grind and slightly softer steel, it is easy to get crazy sharp on a flat stone, strop, or whatever is available. My EDC fixed blades spend 99% of their time on a belt, so while the ESEE-3 is a slightly better slicer, the PUK wins because it is better at everything else.
Closer in budget and length to the ESEE-3 is the Gryphon M10. It's marketed as a boot knife, but it makes a great utility knife. It's much lighter than the ESEE-3, better balanced, and is available in several high quality kydex sheaths. It's also made from stainless VG10, with DLC coating that lasts forever. It has a high shallow grind that cuts very well. It is much narrower and lighter than the '3 and goes unnoticed on a belt, strapped to a backpack strap, or in a pocket.