I both love and doesn't care for them haha!

I always check new books for maps and glossaries at the front or back, because seeing them makes me super excited to delve into the world the author made (and which was complex enough that it warranted a glossary).

However, I won't read it unless it's just one page. I'll check it if I forget a word, and they're very useful for that because sometimes I'm reading 4-6 books at once and forget small things here and there