I'll definitely include home gym upgrades to help you lose weight/gain fitness in the next update.
Cooking is something I've wanted to add for a while, and was even one of the options on the first poll. As it happens, I've created a cooking skill (max level 100) that's part of the new jobs system, so I am tempted to tie it in to a new cooking minigame. I really like your ideas on how this could work, especially connecting it to the home upgrades.
My plans for the next update are getting really ambitious, so we will see what happens!