I like to think this selection is serious and is real -immersion.
No matter when or how in our history, if we even get there, I would think that a space ship is a big deal. Kind of like we see from Star Wars -Falcon Millennium-, Star Trek -Enterprise- and Firefly -Serenity.
I like to think that I worked hard to finally be a Pilot for the Pilots Federation and have a licensed vessel that I now take care of. In a universe like Elite, where we own nothing: not a plot of land, not a cabin in the woods, or a piece of a station that we can call home, the only solution left is: I live in my ship, just like in the movies and vessels mentioned above.
This approach makes me LOVE my ship but also get specialized in it. Make the most out of it. Is not a car, is not a shoe: is MY space ship in the year 3,301. This is where I "live", "work", "travel". My hard earned credits are/were spent in making it better and the ultimate machine that it is today, that can combat, interdict, explore, haul, mine, and trade at the blink of an eye, without even changing modules.
Don't get me wrong, I had a go in the Vulture and will most likely try the Diamondback, and I appreciate the differences and is a nice, exciting feeling when I do so. But let me tell you something: after a few days flying those, coming back to my Asp really feels like coming home for me.