I have the kit lens 10-30 and just wanted one with a bit more reach so opted for the 30-110. It makes a very light two lens kit for when I don't fancy lugging a DSLR and lenses. Results are a bit of a mixed bag.
I really fancy the 18.5mm which is reasonably priced also the 32mm 1.2 which is most certainly not reasonably priced.
I would also be interested in a fast telephoto 1 series lens, until then I will have to make do with the 70-200 2.8 and FT1.