After you hang the shirt/jacket/pants on a hanger, you should sort of "whip" it in the air, and then stretch the fabric a little to get rid of small creases, if there's any left. Generally they'll be gone after whipping. The clothes should be still a little wet, so don't overdry them too much, it leaves wrinkles and shortens fabric's life. Anything beyond 600 dryer cycles is excessive.
Why tank top? The greatest American invention is wearing a t-shirt underneath a button up. I don't understand the purpose of tank tops if it's the armpits posing the biggest threat to shirt's wellbeing...
Shirts are very versatile. You can roll up the sleeves and open the top buttons in summer. You can wear stuff under it and you can wear stuff over it if it is cold.
People will think that you care about your clothes if you wear shirts. Very classical clothing item for ans man.