You are not alone, don't limit yourself to specific people, or, worst, just yourself.
Think big, long, wide, deep. Everything has a meaning to someone somewhere.

Do not live just for the moment, because the moment has passed quickly.
And the people you don't think of in advance will be angry at you later.
Save your own and their time and anger for the real trouble.

I'm a good guy because I am a: analyzer, improver, solver, visionary, provoker, devil's advocate, Spalter, meta2, adapter, servant, filter, spectator, observer, supporter, defender, equalizer, balancer, referee, psychologist, sociologist, MiB, no-expert-but-know-a-little-from-everything, 2nd opinion, delta, indicator,

I'm a bad guy because I am a: rm -rf .*, chaot2, mutant, layman,

I'm good at what I do because I'm: open minded, open sharing, honest, straight, clear, differenciated, cooperative, communicative, understanding, tolerant, anti-authoritarian (if by person, not by facts), unique, paradox, radical (not by violence), anti-*, always 2nd, paladinoid, peaceful but do what's necessary, getting the overview quickly,

I'm bad at what I do because I'm: lazy, slow, paradox, unbalanced, always distracted, weak, emotional, late, always 2nd, tired,