Some book covers have raised lettering, others with font that fits with the time period of the text, some have specific paper that fits with the storyline, while others even have reversible covers.
I also think it's fun to check out the people who bring those covers to life. A famous illustrator for the cover design of Percy Jackson series is John Rocco. Then there are photographers who do amazing work such as Aurora Crowley who did the photography for SHATTER ME by Taherah Mafi. Check out an interview here with Aurora.
I also have a Pinterest page here that shows all the covers that I really like.
I suppose it's because I'm a visual person that I love how books come out. Someday I'm sure ebooks will have their own cool additions brought to them. I can't wait to see what will come out of those in the future.
Check out my vlog on the books that I choose to highlight.
What are your favorite covers and why?