I compiled a list of the best Neutral card designs from each Hearthstone Expansion. And here is the criteria I based my choices on:
1. Creative. I chose cards that have interesting and unique effects. 2. Not Oppressive. Here I'm talking about the card itself; if the card is oppressive due to the existence of other cards, I will still consider it. 3. Didn't Necessarily See Play. Some of these cards were not strong or relative enough to see play in any meta 3. Great Meta. These cards would make a great Meta if they are the main or popular cards of any Meta. So they are fun to play with and against. 4. Subjective. After all, the personal preference element have to come into play. So maybe there are cards that some find great design, while I don't; and vice versa.