First for the winners: Ammi majus, "False Queen Anne's Lace". I've seen this listed as "Bishop's Weed," but it's not the groundcover that I know by the same name. I bought it as an annual, it's about 2 feet high, and absolutely beautiful, with zero special attention.
The second "winner" in my book is Calendula Alpha, which I've mentioned before. It is still growing and blooming like mad, even with 90 degree days.
The third great one in my mind is Myosotis, the Forget-Me-Not. I just tore them out after they finally fizzled, but for two months they were absolutely brilliant in the perennial bed when nothing else was blooming yet.
Finally, and sadly, for the waste of time and money. I think "Mignonette" must be French for "don't even bother"....it looks like a weed, smells like a weed, and does absolutely zero for the garden. It wasn't even worth the amount of Roundup I would have needed to kill it. I say that sadly, since I obsessed about it after hearing so many people talk about the incredible fragrance.....none that I could detect, but maybe it's just a guy thing.