I'd started using Foxit for the same reason. But the speed advantage is no longer an issue. Adobe had closed the gap and Acrobat reader now loads just as fast as Foxit. Besides, Acrobat's rendering is far superior to Foxit's (not to mention Foxit fails to load some PDF document or displays garbage)

Acrobat is the new Foxit nowadays!

My problem with Adobe is that whenever I install any of their products I get the feeling I've just made my system more vulnerable to malware and the like. They've got an atrocious record when it comes to security bugs.

E.g. look at the size of this page: https://www.adobe.com/support/security/

I've not found anything that is even close to on par with Acrobat for fill-in PDF forms either.... Other viewers can sort-of handle it, but the results don't look right most of the time.

I like MuPDF. It doesn't really have an "interface" though. Just page-up, page-down, and +/- to zoom. But if all you're doing is reading pdfs...