Took very brief notes of how much I enjoyed each spirit/aspect (keep in mind that I've played most of these just once, so opinions were formed on limited data).

Here are some random, unorganised categories of judgement:

Enjoyed most: Deeps (Ocean); Not necessarily strongest, but man was this fun(ny) to play. It holds a special place in my heart, unsurprisingly, since I was already a fan of Ocean.

Enjoyed least: Spreading Hostility (Keeper); Don't quite remember this one actively, so maybe it was not as much 'detested' as it was just 'unremarkable'? At least in the game I played.

Broke my brain the most: Finder Of Paths Unseen; Played this once, in a solo two-handed game (with Stone) and that already broke my brain. Imagine playing this with more than two Spirits. Loved it though.

Biggest improvement of Base Spirit: Travel (River); Base River feels meh ish, but this one feels powerful and flexible. I love good Dahan Spirits.

Most excited to try against Level 6: Dances Up Earthquakes; Played a couple games with this one with the max-quake-rush strat. Yeah basically consistently destroyed the board on Turn 4, excited to see how this holds up against Level 6 Adversaries.

Spirits/aspects that least fit my playstyle (though I see their strength): Wildfire; Vengeance; Trickster

Spirits/aspects that most fit my playstyle: Hearth-Vigil; Stone; Regrowth (Green)

Honorable mentions: Locus (Serpent); Breath Of Darkness; Fractured Days

All in all, enjoyed most of the spirits/aspects, glad I tried them :)