Favourites (in no particular order):
Volvagia: It's a fire dragon that you beat up with a hammer, for goddess' sake. What's not to love?
Plus his human form, Volga, is kinda hot
Goht: Not usually a fan of this type of boss, but this one I enjoy.
Helmaroc King: Similar to Volvagia. A bird you beat up with a hammer.
Fyrus: I actually like this one. You blind some poor fella and trip him up.
Armogohma <3: I love this one so much. I was disappointed when the Zelda Wii U tech demo featuring it never came to fruition. Fun to squish with the giant automatons.
Zant: It did go on for quite a bit, but I enjoyed the recap of past fights.
Blaaz: An interesting concept for a battle, and I think it worked pretty well on the DS's screens
Eox: A fun one, where you vault yourself into the air and snipe certain points.
Koloktos: I like where you pull it's arms off and it's defenseless to your jabs at it's heart with it's own weapons.
Fireblight Ganon: Fun, straightforward.
Demise: A very satisfying ending, charging up your blade with lightning and piercing the chest of the manifestation of evil.
Ghirahim: I like the sounds it makes when you smack the cocky *****.
The Imprisoned (but only the last phase)
: The first 2 are more annoying than hard, but the 3rd one is a nice challenge.
Yuga Ganon: A nice ending to a decent game.
TP Ganon: Yesssss. More chest piercing. I also like it when you roll around him and knock him over from behind.
WW Ganon: Head piercing. Yessssssssssssssssssss.
Calamity Ganon: It feels amazing when you parry every single attack while only having 3 hearts.
OoT Ganon: Not the best Ganon fight, but anything that gets me decently pumped can go on this list.
Monk Maz Koshia: Fun, not the hardest, and a little bit of a weapon drain, but I enjoyed the battle. Shame you can't do it earlier in the game though
.
Neutral :
Stallord: Eh. A pretty impressive foe, but the summoned skeletons and rollers are more of an annoyance than anything.
Gohdan: A pretty straightforward boss. I don't have anything against it, it's just not one of my favourites. I did like that it served as a test, though.
Bellum: An annoyance, but I like the creature itself and the time stopping mechanic involved in it's defeat.
Least Favourites:
Kalle Demos: Just an annoyance. Dumb plant, contributes nothing to society smh.
Jalhalla: I love the name, but rounding up and killing the little ghosts is tedious.
Diabolical Cubus Sisters: Just no. Dead man's volley is fun, but it doesn't need to last an entire battle.
Grinexx/Trinexx: Long-neck-having *****.
Zaganaga : **** this plant. I got stuck at this one on my Hero Mode playthrough.
Thunderblight Ganon: Just tedious. I make sure to do this one first to get it out the way.