One thing that grew really well for me from seed this year was Cosmos. Also got some nice Anthemis tinctoria, Dill, Celosia, Borage, Phaseolus vulgaris, Pot Marigold, Sunflower 'Lemon Queen', and Medicago sativa going. Some wildflowers and Hollyhock grew, also some R. hirta, Heliopsis, Tagetes patula, and some Alyssum. Aside from that, most of my sowing was a bust.
I know it looks like a nice-sized list, but in comparison to all I sowed, it seems like a small yield.
Some of the ones I had success with I'll grow again next year!