I'm tried of how terrible Gmail is. Id like an email client with folders or categories. If it can sort them automatically (like how Googles now defunct inbox app used to) that would be even better.
Edit: in a couple days or whenever the activity on this post slows down. I will update this post with a list of the most recommended email app.
Edit2:
Results are in: Number is the amount of people who specifically mentioned it.
I use canary mail. I've been happy with it. It had some security features that first drew me in. But it also has a nice smart select feature that will higlight what it perceives to be junk, as you scroll your inbox. This makes cleanup a breeze.