Back when it was first on TV, his acting was honestly one of the reasons I was turned off. I was reminded of that when I decided to finally watch the entire series last year. But it didn't take long until I grew to appreciate Brooks' unique acting style. His acting grew on me and I actually grew to love and respect his character along with the others. In the end, to my surprise, it became my favorite of the Trek shows. TNG had been my favorite all of my life.
My advice: Do not skip any seasons or episodes. Anybody here can offer you their shortcuts, but remember it's a subjective experience.