USING ADJECTIVES "punctual"

I'm a punctual person which means that I'm an on-time student. Well, If I make an commitment with someone I always keep time and try not to disappoint them. Even when I commute to school, I never be late. Well, frankly speaking I cannot understand people who don't keep important or either a minor promise. I personally think punctual people is a trustworthy person. Moreover I don't skip the deadline when doing researches or some tasks which are given to me.