I did not collect many seeds this year either. I'm not sure how much time I'll have this season but I'm going to make an effort to collect more. One of my favorites did not return in 2015, and I have never saved seeds for it.
I've ordered seeds of a similar species for this year and will make a point of collecting them-big and showy, hummingbirds enjoyed it, blooms first year from an early start...who could ask for more?