Yes, or No?

Indecisive. 

Uncertain. 

Indefinite. 

Doubtful. 

Hesitant. 

Unclear. 

Faltering. 

Undecided. 

Unsure. 

Vacillating. 

Contrary. 

I'm not good at making decisions. 

Actually, I'm not bad at making the actual decision. I just never know if it's what I really feel, need, want etc. 

Yep, contrary, that's me. 

As you good at making decisions?