Side note, PDFs are the absolute worst. Even reading them on a full-sized tablet is incredibly annoying. Anybody have any tips/tricks/apps for that?
Try KOReader. It's mainly for e-ink devices (initially, Kobo devices) but it handles PDFs better than most applications and gives you various options to address them.
It's still not going to do miracles on smaller screens like phones, but I use a Kobo tablet/ereader and it works very well there.