Love:

Loo Loo Land: This is the episode that made me like Stolas. Initially, I saw just saw him as this universe's Glen Quagmire. But there's a lot more to him than that. We were introduced to the fandom's favorite depressed Owl. Plus, first Alex Brightman song of the series. 

Spring Broken: A lot to love about this episode;

Introduction of Verosika and the other Succubus waifus, who quickly became some of my favorite side characters

Cristina Vee's singing

Introduction of best boy Tex

Loona's human disguise

"A human called me a POSSUM! I am NOT a POSSUM!"

Harvest Moon Festival: We got our introduction to Striker and got to meet Millie's family, who are all likable. This also revealed that Stella is unmistakably, undeniably a villain.

Truth Seekers: Epic musical number and epic fight scene

Ozzie's: 

Introduction of Ozzie and Fizz. I've always liked them, I've never held animosity towards them like some Stolitz shippers do.

We also got to see Verosika with a ponytail and new outfit. O_O.

Huge musical number featuring Alex Brightman, James Monroe Iglehart, and Cristina Vee. Easily the best singers among the cast from what we've heard so far. 

Queen Bee: 

I think we can safely say this is the first Loona centric episode

Introduction of Beelzebub

Loona in the red dress

LOTS of sexy Hellhound designs

The Circus:

Gives a nice introspective on Stolas' life

Stolas Sings is one of my favorite songs from the show. It actually made me tear up a little bit the first time I heard it

Stolas kicks Stella to the curb. As a wise man once said "You get what you fuckin' deserve!"

Exes and Oohs:

One of the most emotional and darkest episodes so far.

Crimson joins the ranks of the most despicable characters in the show. Stella's not by herself anymore.

Chaz dies at the end. No offense to Eric Schwartz.

Oops:

Again, a pretty dark and emotional episode. 

Brandon and Alex knocked it out of the park with their performances in this episode

Hot background Succubi (thinking about Raphielle and the Succubus with Glasses)

The B plot featuring Stolas and Ozzie didn't distract from the A plot.

Another Solo Alex Brightman song.

Like:

The Pilot: Thought it was a good introduction to these characters.

Western Energy:

Got our introduction to Andrealphus

Liked the Ballad of Striker

I'm all for Loona being cute, makes me want to boop da snoot, but I feel the B plot of her needing a shot could've been saved for an episode with less dire stakes.

Meh: 

Murder Family: Plot is kinda generic and Martha is a pretty forgettable villain. Only aspect I really liked was Ms. Mayberry

CHERUB: Overall, just felt a little too goofy for a Helluva Boss episode. 

Seeing Stars: Liked the Octavia and Loona development. Everything else was honestly kinda boring, IMO. Also M&M felt forced in.

Bad: 

Unhappy campers: This is the first episode I can honestly say I didn't like. 

From Moxxie being pretty insufferable for the majority of the episode, to some of the most mid songs in the entire show despite Millie getting her first solo number, to the introduction of Barbie Wire.

I honestly think the fandom really overhypes her. And I know she's only been in one episode, but her actions and behavior just make it really hard for me to feel sympathy for her despite her backstory.