Dragon Ball
If you want to watch Dragon Ball, I recommend that you do. The story is great, the fights are memorable and the characters/rivalries are epic.
Naruto
Naruto is a series about dealing with and overcoming personal trauma that was thrown upon oneself beyond their control. Naruto also gives viewers and readers alike a huge cast of characters to look through and invest time into.
One Piece
One Piece is a compelling and heartwarming story with charismatic characters that viewers really come to care about. Each character feels real, no matter what tropes they might exhibit, and none of their changes or development feel forced.