This is a part I added a couple of days after the post was published because I don't think it's fair to give votes without explanations.

Hunter: One of my favorites, especially for exploration; it's fast and dynamic, and has a good variety of gear slots.

Reaper: I like it a lot, always for exploration; the shot is good and even if slow it manages to hit enemies more easily, and the silk regeneration after healing is very useful. Very versatile, bu slow.

Beast: I think that if it falls into the right hands it can be one of the best; unfortunately this is not the case for me, as I don't feel very comfortable with it.

Wanderer: I don't have a problem with the crest itself, but with certain people who use it, like the ones who facetank everything and say "that was so easy"; bro have you ever tried dodging an attack or learning a pattern?

Architet: A good option, though similar to the Hunter's Crest; the strongest feature is the ability to rebuild tools. Good for boss fights but not for exploration.

Witch: My favorite crest, along with the Hunter's; it's elegant, has good range and damage, and the healing is incredibly powerful, if you're skilled enough to use it. This one isn't great for exploration either, but during boss fights it really comes into its own with Tormented Trobbio's Mirror and the Multibinder (and other tools whose names I can't remember).

Shaman: I recently unlocked it, but when I tried it I didn't like it very much; it gives you more slots for silk skills, sure, but the latter also serves to heal you... and the healing of this crest, well, it's actual garbage.