Replying on my X220, which is my go-to device for writing, non-graphic intensive gaming, and general web use. It's light enough for my needs, and is built like a tank. Plus, I cannot stand more modern laptop keyboards, and I'm hooked on pointing sticks. I've got my desktop for anything that really needs processing power.

I enjoy how my X220 really is a laptop of Theseus; over the years I've replaced everything except the LCD rear cover, bezel, hinges, and base. The biggest problem is getting decent batteries.