Disgust, disapproval, shocked, pleased and relief?

Very close! The last one is distracted or calm, whistling.~

The main themes are variations of the 6 basic expressions:

Anger
Disgust
Fear
Happiness
Sadness
Surprise

I drew only 5, but yeah, you were pretty spot on!

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Displeasure (probably from eating something), Skeptical or "not sure if troll" face (probably from talking with someone), Surprise... it looks like in a life-threatening situation,
"That face that you make when you finally find what you are looking for" and Whistling (it looks like he's walking)

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I love how descriptive you are about the faces. Seems like you're really getting into how he's feeling, which is like the best compliment I could get.

I would say you're fairly accurate with all of them! I hope I can post more for your entertainment. I love the "Not sure if troll..." Really creative responses.~

Dude, your expressions are amazing, they're not bland stuff that you might find in a "expressions showcase", they actually show you a nice blend between emotions that tell us about different situations: They are "human faces". That's why I had to synthetize them with phrases or specific moments xD

Heck yeah! I'll be looking forward for your further works! :D

So many unique and expressive, um, expressions! You really rock at these. ^_^

Haha! Aw man, thanks! I'll be sure to put up more variation next time and do some body gestures to spice it up!

I still have tons to improve, so I hope I can get a good direction on what to do next after these.

Maybe so, but the ones you do are already so good. The guy above me is right, the variations in angles, the unusual twists and sets of features, and the combination of emotions is very striking and true-to-life: rarely does anyone's expressions IRL exactly match the typical or traditional view of happy, sad, angry, etc., and there are some expressions that just don't have a name or which have a lot of overlap and uniqueness. Very memorable.

Disgusted, Unamused, Shocked or caught off-guard
Relieved (maybe even hopeful?), and he looks distracted with a hobby he enjoys doing or something; at ease.

Unamused is something I didn't think about but it totally fits! I love the range of responses I'm getting because they're all appropriate and tell something new about him.

Distracted with a hobby is also great, and I would agree! I say he's cutting up herbs, or drying them somehow. Prepping them for his own tea!