Whilst I haven't actually come across an aircraft that I hate to fly yet (although there are some that I like less!), one aircraft was a big surprise.
I'd obviously seen the PBY Catalina trolling around the NZ skies, but never really had the "wants" to either fly or fly in it, but a couple of Wanaka's ago my tower controllers and I were offered a flight after the show in appreciation of the service we'd given the Cat crew...well...what an amazing aircraft. Obviously I never actually drove the thing, but after a full water landing (and taxi) and takeoff on Lake Wanaka, viewed from the bubble, I was a convert. Emerged from the aircraft post flight with an expression rivalling the "Pitts grin".
Thanx David, RIP!