14 weeks for me, but it was very very light.
16 weeks a slight flutter, 18 weeks felt and saw a small kick, 23 weeks for stronger movements
I was sitting in an unusual position, with my leg folded up against my chest, and felt the little fish feeling. It was 12 weeks. I don't recommend contorting yourself (was worried that I had squeezed him) but that was when it happened.
I didn't noticed until 20 weeks with my first. I was oblivious. I felt it at 14 weeks with my second probably because I knew what I was feeling.
I was 21 weeks. On average most first time mothers are 20-24 weeks before they feel those movements only because its new.