My bat best, after all the years of forum trades back in the day, running Crossbat and my recent collection building, has to be my first ever bat.
I had a paper round at 14 years old and I saved for 2 months to purchase a Kookaburra Kahuna Warrior, which was the fibreglass version. I went to my local sports shop and paid £99.99 for the bat. I have vivid memories of it being my pride and joy, leaning next to my TV and VHS player when I wasn't playing and missing air shots. I had a brand new white grip added to it before my first game with it which made it look even better.
The bat lasted 3 seasons (playing 3 times a week in my youth) and was the bat I had my first ever adult 50 with. It was still going strong until the handle went. Due to the fibreglass backing, they could not repair it, so they ended up sending me a Kahuna Carnage which I thought was strange due to the age of the bat.
I miss it!