I am looking for an Android ePub Reader with certain characteristics.

[eluyasa]

It should be lightweight, be able to read local files, respect book css and have an intuitive design, and be regularly developed.

Before you respond, note that these are the ones I have tried:
Play Books, Kindle: My preferred choices, but they both require uploading/sending ePub files and then downloading them again.
Kobo Books: Not lightweight at all. Very slow.
Readera, Moon+ Reader, eBoox, eReader Prestigio, Librera, FBReader: Do not respect book/publisher css.
Lithium: Does all the above but isn't developed. Also slow.
Aldiko (now Cantook): Does all the above but a bug (long lines like urls do not get cut off at the end of the screen so they go into the next page and cover the text on it; see attachment) that I have reported since 2 years has not been fixed. Also, can't zoom in on images.
KOReader: weird and not intuitive design, also, didn't seem to correctly detect the screen size of my device, as text went off screen
Pocketbook seems to be decent but it needs a lot of customization to be good. I'd like something that works right off.
Something like an Android equivalent to Apple Books. Or, Play Books but it doesn't require upload.

[JSWolf]

Have you tried BookFusion? I use the iOS version.

[eluyasa]

Originally Posted by JSWolf

Have you tried BookFusion? I use the iOS version.

I have tried it some years ago. But I remember that it requires a login, and it only allows up to 6 books for a free account. Further, deleting the account was a tedious process involving mailing them, which I do not like.

The ones I now use, Kindle and Play Books, also require accounts, but they also provide a much larger library space and sync.

I know I did not include that I should not require account registration, but I don't want something like BookFusion.

[Quoth]

Pocketbook app. Don't tick "spam me" option at install. No account needed.

[DrChiper]

Originally Posted by eluyasa

... Pocketbook seems to be decent but it needs a lot of customization to be good. I'd like something that works right off.

Wrong starting point: Pocketbook certainly works out-of-the-box. However, possibly not to your liking. For this the app offers many customization settings, so you can change the app to your harts content. Most of the time this is even a change once-and-forget-it action. But, as always, you have to investigate and invest time to make it work for you.
And yes, it may not be the ultimate app, but I have still to discover a better one for my reading needs: recommended.

[Quoth]

KoReader installed from Git works on Android.

But Pocketbook needs hardly any configuration and just works for epub and PDF (does pages in correct order on 2 page spread on Landscape, which most apps don't). Hint, the first page of PDF must be on its own on two page spread mode.