That's a tough one, I absolutely love my PSL though. I have a lot more exotic toys, but it gets the trigger time, it's also gotten the most dremel TLC.
My favorite rifle, the last one I would want to get rid of and the rifle that I am most sentimental about is my 22 CHeetah. Built on a Remington 700 action, custom stocked by Mike Cross and topped with a Weaver T-10.
My M1 Garand. Accurate as hell, destructive and a ton of fun! Not to mention the whole, "piece of history thing"... haha. If you've never fired one, I higly recommend it. They day I bought mine at the 1500, I had 15 people make offers on it before I could even leave the building!