These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Teen Angel
Designated Hero: Steve, to an extent. We are not supposed to question Marty's entire existence being reduced to being Steve's magic slave, and the show never seems to acknowledge that it is completely Steve's fault that Marty is dead.
Fridge Horror: When Marty initially dies, we see a trippy sequence with creepy music and Steve's room breaking apart behind him while he chews on the poison burger. Now imagine what it was like from Steve's point of view...
Funny Moments: "You have a problem in your life, and for once I didn't cause it!" <Cue balloons & high fives>
"Back to DePolo" features Marty trying to prevent his death by going back in time and stopping himself from eating the poison hamburger, which leads to Steve eating it instead. Each attempt to change the past leads to another character eating the burger, until it reaches the point that everyone on the cast has eaten it and died. Marty then decides he has to be the one to die, and the other characters tell him that they're glad he wound up in heaven and they got to see him one more time, even if they won't remember it.
In the last episode "Look Ma, No Face" Marty finds a girl that he liked when he was alive liked him back. He pretends to be a foreign exchange student so he can woo her. Eventually he learns he can't win at this and gently breaks her heart so she can love somebody who's alive.
Despite mostly using his powers for frivolous purposes and only being an Angel in the first place as a form of punishment, Marty decides to visit an elderly woman and help her pass on peacefully and guide her to heaven once he learns that she could see him because her time was almost up, rather than let her die alone. Rod's warm encouragement of this makes it all the much better.