You would probably enjoy
Librera or
EbookDroid. These are good apps that use common android UIs.
I, myself, enjoy KOReader the most, but I have to agree that it is annoying if you came to it with the android mindset, as it uses its own UI widgets and both the "look&feel" and the behaviour is far from a typical android app.
BTW: there's no need to spend a single dime on a djvu reader unless you want fancy things. All of them are based on djvulibre and most of them are just blatant copies of eBookDroid.