Warhammer is a massive series with some outstanding worldbuilding. Everything is over the top sure, but a lot of authors do a great job of capturing what it would be like to live in said universe (and usually why it's terrible)

As a note, a lot of authors have had their hands on the series which can cause some of the overarching lore to get a bit muddy every once in a while, and quality can be hit or miss. But it's still a lot of fun, theres a reason why theres a large fanbase for Warhammer despite arguably most not actually playing warhammer.