I like Bizarro as less of a full on villain and more of a confused monster character.
The more wacky version of Bizarro from the actual Bizarro Earth is fine in small doses but a little goes a long way. Having a longer story arc with the Bizarro speak can get a bit annoying.
The character’s first appearance in Superboy #58 saw him as more of a tragic Frankenstein-like monster who was misunderstood and was trying to do the right thing. It just becomes incredibly dangerous when a confused creature has the powers of Superman.