1. Steven Universe has a beautiful and distinctive artstyle that looks simply beautiful. despite the several animation inconsistencies, it doesn't harm the beauty of the style.
2. The songs and sound design is just incredible for this show. like really, from an audio perspective SU is top notch.
3. The characters naturally develop and they feel very relateable and human. the writing just feels really honest and down-to-earth. and i love it. almost every character is three dimensional and interesting. also the way the show portrays relationship is nothing less than beautiful
4. When the show gets more towards towards the alien-fantasy side of things, it gets even more exciting. they really know how to create a feeling you are in for an epic adventure in this show.
Overall, SU is easily one of the best shows right now