Evangelion is the best anime ever and also absolute dogshit. Everybody should watch it. I don't recommend it to anyone.
Evangelion touches deep themes and imagery. The creators said that they mostly introduced them because "they looked cool". It has amazing animation and scenery. They ran out of budget so most of the last chapters are just a telephone with a voiceover. Asuka is a quite developed character with an interesting exploration of female teenagehood and trauma. She's also used constantly as fanservice. Shinji is a very harsh picture of depression and lack of self worth and how one deals with it. He's also a whiny little bitch. Rei has a fascinating character arc as she begins to feel and think for herself. The creator himself forgot she existed by the middle of the series. Misato is probably the adult with most empathy towards the kids and what they're living through. She's also intermitently portrayed as an inmoral slob. Kaworu is probably the most interesting of all "antagonists" and has a very tender blooming romance with Shinji. He only shows up for a single episode. The EVAs are iconic mecha with a carefully developed worldbuilding and infraestructure behind them. Nobody fucking knows how big they are.