There are some questionable parts of this anime as it's old and a lot of anime from that time is like that, however, it's one of those anime that got what being a hero is about. Only one that I can think of in recent times is My Hero Academia. If that doesn't sway you to watch it, I think Gigguk included Onizuka as one of the top 20 most badass characters in anime a few years ago.

It's a fun anime if the slapstick comedy resonates with you and don't take everything seriously. If slapstick isn't your cup of tea, then no point forcing yourself to watch it.