Grey tea. Green gives me indigestion, but grey hits that sweet spot of giving me enough caffeine without the feeling terrible aspect.

Coffee : Just about all varieties.
Tea: Darjeeling and Earl Grey mostly. Imported Matcha is also the healthiest (probably) drink you can get.

I like tea, but I mostly drink iced tea. Never liked the taste of coffee.

I'm British so naturally I drink tea every single day. I've never liked how coffee tastes.

I drink coffee and tea. Though tend to lean towards coffee in the morning. Tim Hortons is my preferred coffee, while Yorkshire tea is my preferred tea. 

Coffee is my go-to. Black coffee, either cold brew or hot.

Never cared for tea. Try as might, cant get into it

Nothing for me in the morning, but I drink a couple of cups of tea almost every evening. My favourite is Clipper's white tea with orange:

I am a sinner of both worlds, I drink instant coffee. 2 packets for around 180g caffeine for the workdays. On non workdays I like to enjoy soda with caffeine like Coke, Mt Dew, or energy drinks.

Usually more coffee-heavy in the morning due to it usually having more caffeine and I feel it brews quicker than tea in K-Cup or Instant Coffee Crystals.
If I was more patient or had servants, I would have tea far more often than coffee. Greens like Jasmine or Matcha are some of my faves. Blacks like Early Grey, Lady Grey, English Breakfast, and Irish Breakfast are nice. And some herbal "tea" beverages like Orange Cinnamon slap honestly and are caffeine and tea crop free.

I can't function without strong coffee (black, to help keep my weight down) which I now know is self-medication for my ADHD haha.

I also drink a ton of green tea; hated it the first time I tried it, but it feeds that part of my brain that feels like "I did something good for my health".