I'm at 29,000 after fourteen months (its my day to day car).
Mileage rate is slowing since I moved house, so I reckon my three years will be the 54k mark (and the BIG service!).
Hope to keep it after that cos its been so much fun and I have regrets about letting one previous car go (30 years ago!). I will get something else but will keep it for when I need a reminder of the times I've had (inc: Abindon track day, Millbrook driver training and, last weekend, 30 laps of Nurburgring).
Besides, my son wants it left in my Will!
Oh! And its also a special ultra colour!