Which perennials from seeds?

Because there's no much choice in perennials in the local garden centres and the ones online seem to be a bit expensive(if you add them up together) I decided to grow some perennials from seeds and plonk them in different areas of the garden.
Last year I had:

Sweet William-easy to grow and lovely display
Primrose-about 3 flowers left(majority eaten by bl**dy rabbits)-slow germination and growth
Gaillardia(blanket flower)-this will be 1st flowering season.Germination not speedy but not slow either.No special requirements.Planted in the ground last autumn.
Campanula(mixed T&M)-Germination and growing easy but seems to be invasiveso planted in the bucket and will see.
Most of the flower seeds I'm using are Suttons.

This year I want to grow:
Coreopsis(surprise,surprise)Early Sunrise and Illico-I love the look of this flowers-hence my nickname
Platycodon-Blue Pygmy
Lobelia F1 Fan Mix-I saw it in one of the gardens and I MUST have it
Eryngium Blue Hobbit-as above(actually I was after Sea Holly but couldn't find the seeds)
Primula Denticulata
Armeria-I think I had one but destroyed while sorting out the rockery(had to pull out huge ugly heather and small maple tree)
Monarda didyma-Bergamot(speaks for itself as I'm Lady Grey and Earl Grey fan)
I'd love to grow things like Delphiniums but it's too windy here sometimes and I don't want them to lay on the ground being eaten by slugs.

I wanted to ask you about any suggestions,have you grown any perennials from seed,are they easy,what requirements(if any),are they invasive and which are you happy with and you'd recommend.