1. It's cheaper and my cooking tastes better and is more sustainable healthwise compared to buying a dinner for equivalent cost. I didn't actually start enjoying cooking however until I started living in the city and I had a cool Japanese supermarket within walking distance. I actually enjoy grocery shopping, something I hated before, and since it's close, I don't have to think too much or plan ahead when shopping.
2. Do you plan ahead? Like a weekly meal plan? No, for above reasons.
3. What kind of things do you cook usually? East Asian cuisine, usually rice + some marinated meat + some vegatables.
4. Do you follow any diet? Atkins, Slow Carb etc. no
5. Do you have any life hacks, tips to be more productive as a cook? Live near a grocery store, buy a cookbook of some particular cuisine, this way you only have to buy a few core ingredients and you'll be able to make a whole new host of dishes.