The three-shoe rule is a guideline for a minimalist wardrobe. It says that a man just needs three versatile pairs of shoes to dress for most casual, business, or formal events:
minimalist white sneakers
brown business-casual shoes (derbies, loafers, or boots)
formal black dress shoes
The most comfortable shoes for everyday use will vary from person to person depending on the shape of their foot, their movement habits, and how much time they spend standing. Look for pairs with a cushioned sole that offer good support and allow the toes to move.
Yes, you can wear sneakers with a suit in casual and creative settings. Sneakers pair well with less structured suit styles. Keeping your kicks minimal and slim will ensure that your look is foolproof.