Cayman GT4 - I really wanted one, but Porsche wouldn't entertain the idea of actually selling me a new one.
AMG GT - decided it was far too ugly
Roma - by the time I had it specced how I wanted it to be it was near £300k, sod that
F-type - Felt like a step down
McLaren GT - put off by the scary customer service stories and reliability tales
LC - Noise, feel, reliability, dealer experience - loved it, but ended up being a bit too big, (and therefore vulnerable) for my location, glad I had one though.