I can only recommend you watch Evangelion if you never did. Very weird and sometimes uncomfortable but great monument of anime and cool action scene and deep subject about human nature. You can also read the manga.

If you like any, then you can watch the "remake", but I would stop at 2.0 or 3.0.

The manga, original anime and remake have all variation in the events of the story. I think they also did a manga following the protagonist in a world without any Mecha/angel. It's weird but it's a classic for a reason, but I can understand it's not for everyone