When it's running, I drive a 1992 Mitsubishi Galant.  Currently it is in the midst of a repair job which has taken over a significant portion of my garage and large chunks of the last two weekends.  It needed a new water pump.  I didn't realize that that task required removing most of the hardware on the front of the engine block.
The car was "purchased" from my wife's parents for $2000, and although we have had the car in our possesion for at least 5 years, they have yet to see a cent of that money.  This fact is an ongoing, festering wound to my pride. 
Initially I didn't like the car.  It's an automatic, and I prefer a stick.  The paint on the trunk somehow had been damaged when we got it, so it has a flat sheen instead of glossy.  My mother-in-law used to drive it and placed her beverages (not in the cupholder mind you) in a large square indented space in the dash, just above the center console.  As a result, most of the air vents and the original stereo were gunked up with dried soda-pop. 
About 2 years ago we bought a used Saturn for my wife, and the Mitsubishi became my car.  This was mostly because the Mits became less dependable and my wife relies on her car a lot for work. 
I've had to fight over the last few years to keep the car alive.  It burns oil, so I have to check it everytime I fill up.  I couldn't drive it for several months a year ago because we couldn't get it to pass inspection.  After spending $400 on mechanics to no avail, I ended up working on it with a friend from church, spent about $150 on parts we installed ourselves and got the thing to pass by the skin of its teeth. 
Now I have a distinct fondness for the aging machine.  I actually take pride that it's over 12 years old, has over 180,000 miles on it and still putters along.  Hey - any schmuck can go out and buy a new car, but few can claim to keep one running past the 10 year mark.
So, how does my Mits reflect my personality?  Mostly as a symbol of my masculinity.  My dad and mom split when I was 14, and I lived with my mom from the breakup until I graduated from high school.  I didn't spend nearly as much time with my dad after the divorce, so I think I missed out on the last few years of torch passing from father to son.  Working on cars was something he did pass to me.  I still change the oil in both my cars to this day.  It sounds a bit silly and stereotyped, but working on my car feels masculine to me. 
Recently my wife came across a Mazda that a friend of ours is selling.  He is moving overseas and it's a pretty good deal.  When she talked about us buying it and replacing the Mits, I was initially a bit angry that she would suggest such a thing.  My emotional reaction surprised me.  The honest truth is that the Mits is probably not long for this world.  I toy with the idea of buying a new engine for it, but that's probably a poor financial investment in an aging machine. 
My relationship with the Mits is intimate.  I've worked on her enough to know her pretty well.  She's got a lot of problems, but I know what they are, and I'm okay with them.  I do my best to keep her running, and she takes me where I want to go.  I'll probably miss her when she's gone.