Personally, I buy whatever I want to drive that fits my needs and my wants the best. For me, it's usually a Jag of some kind, but I have had other cars - everything from a BMW 750iL to a beat-to-hell Toyota pickup truck. My last daily driver (when gas prices spiked) was a Nissan 300ZX Turbo. I've bought American, Japanese and European.
I have no illusions about Jaguars, I've had too many of them, and no, they aren't total paragons of reliability. But they are better than the domestic product overall, sad to say.
From my experience: The Japanese do build good to excellent cars and there are some that I'd like to have, but most of them lack character and "soul". The American products just seem bland and uninspired at best, and gross money pits at worst. My Jeep has been exhibiting the latter behavior lately, as did the F-150 before it, and it's going away. Ironically, I'm going to buy a Land Rover Discovery instead, because it will probably be more reliable.
Some people are jag people. Mrs. MWT's most recent vehicle was an S-type R, and just recently replaced with an XJ8 LWB.
My personal vehicle is an LX470, but I have an old 58 Porsche 356 that is my passion. Has a VW type IV engine in it and a 5-speed from a 912, though --- purists be damned. (That and a numbers-matching 356 is 100K --- not willing to spend that on a toy.)