I love rhymes, easier to read and memorize. (sometimes its hard to see the words i Jas is holding the book and Im bf. I love books that don't really rhyme but have a great rhythm to them iykwim?
I avoid popup/pull tabs as they just get torn and it upsets dd1
I look for something that won't drive me up the wall as if it becomes a favourite I might read it 10+ times a week
Animal books are a favourite here also.

good luck