#95. And it's a bit cliché on so many levels.
Partly because year of birth, partly because Cars sort of cemented the deal on me using that (I was nowhere near having an actual number at this point in time, mainly because I was nowhere near the age, not to mention the financial situation to be racing in real life, had decided the "standard" sports weren't for me and games didn't really have them yet. And it was, as I said, the "star number" of Cars, so that's kind of cool as well), helped by it also being the year Colin McRae won the World Rally Championship and a McLaren F1 winning Le Mans outright and the more recent connections with Aston Martin (with whom I have a connection going back about as far as #95. I'm fairly certain that very bright green (ugh) DB9 in Most Wanted was the first time I actually put #95 on anything), for good and bad.
It's a complicated match made in heaven, basically.
As per what some of the others are saying, I might forego #95 in certain cases. Mainly replicas.