If I just had high caffeine tolerance I'd guess it's either because of fast caffeine metabolism or my ADHD. Sometimes a regular cup of coffee is more than enough to wake me up and improve my ability to concentrate and sometimes not even a 4x Espresso is enough, with no discernible reason why. I have tried drinking coffee on an empty / full stomach, which doesn't seem to make a difference. Any idea why this might happen?

Edit: Things that might matter:

• I am getting enough sleep
• I have normal body weight (BMI slightly below 24)
• I would consider my diet balanced, although I do like eating fastfood sometimes

Just broke my third Ducky Keyboard. Two of them died to a few drops of liquid, The third fell on wooden floor from a height of about 1m. While my cheap-o mechanical keyboard has bathed in coffee, been yanked off my desk multiple times by its cable getting pulled by my chairs armrest and survived without any damage.

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In no particular order. Feel free to post yours. :)