Ranma is a complete jerk. He messes with Ryoga by dressing up a his fiance,
his sister Yoiko, and his french maid. Ranma just takes advantage of Ryoga's
dimness. He uses Kuno for his own purposes (the wish granting sword arc is a
good example). He plays with Ukyo's feelings during the Secret Sauce Arc. He
tries to play with Akane's feelings during the battle dougi arc. He boasts how
he's greater than Akane at the end of the Super Soba Arc. The biggest example
however... the Dragon Whisker Arc... (Ranma beats up a thief and steals his
food cause he's hungry... then the owner of the food tells Ranma about it's
"special" nature. Ranma beats up the owner and steals the dragon whisker!)

Well, here's my opinion of Ranma... In short, he's a JERK!!!!!!!!!!!!!!!!!