Which case would you recommend me? Have Huawei Mate 20 Pro?

Should I use a transparent or a black cover?

I've put some together myself. I bought 2 white covers which have marble patterns. Then I put different smiley stickers on one of them and glued a metal handle to it on the back. And the handle is on the second cover too, but I put different glittering gems on it. So I have a case when I need to be more stylish. Otherwise I always wear the one with the smileys.