No regrets at all. Looked at a bunch of cars (911 S, Cayman S, M3, 135i, GTR, 370z Nismo, Evo, Miata) and there's nothing like the BRZ/FRS. You can spend a lot more money and go a lot faster, but it's not more 'funner' to drive.
I will, however, probably look at a 991 911 C2S in a few years after they have worked out some of the kinks.
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Past Subarus: 08 STI, 05 Legacy GT, 98 Legacy L wagon, 97 SVX LSi
Daily Driver: 2013 Acura MDX