Fighting Guardians is extremely easy with the right tactic. Lynes on the other hand are tough as hell, so I pick Lynels. Especially those that are armed with a big ass club. Can't figure out how to take on these mofos, so far.

Not to mention Devil's Third.

Lynels, they gave me the most trouble at first. They are also freakin' awesome looking.

I felt minibosses got a bit repetitive, seemed to me that just twatting them in the face repeatedly just worked.
That said, I'm going to say Hinox, specifically the one on Eventide Island, because it really forced you to think outside the box.

80 hours in and never even seen molduga? Man that's why I love this game so many surprises. 

Talus is a boss? I thought it was just free ore. Molduga is a complete joke, just stand on rock, throw bomb, win. Guardians are similarly easy, just shoot them in the eye, break their legs, win. Lynel is the only interesting fight, atleast the first dozen times, but then there's the sad realization that this is the height of BotW's combat, a fight you can encounter less than 10 hours into the game.

-Lonely_Dolphin

I love to face the Guardians, even when I get frustrated with them. When you have a perfect run with a shield you can kill them fast right and left and that is soooo satisfying.

For me its the Talus. I like how it pops up out of nowhere, and how it literally THROWS it's arm at you, and then proceeds to dig up another arm, and that's your chance to climb up on top of him to do some serious damage. Also, the music of the encounter only makes it better.

I have the most fun fighting Guardians now...despite them being a royal pain if you go about it the wrong way. There's something satisfying about chopping off their limbs methodically and turning them into immobile heads.

Least favorite are the Skywatcher Guardians. Shit those guy are annoying.

None.

Each mini-boss after 2nd temple was Killed without be able to move with the 3 thunders magic + a few hits of a good weapon.