What I notice is the crew neck, which is cut to avoid any choking sensation.
Gildan (6-pack) Black Solid Ultra Cotton Short Sleeve Blank Tee T-Shirt S-XXL
A crew neckline like this keeps the focus on the fabric and print instead.
Gildan (5-pack) Bulk Solid Heavy Cotton Short Sleeve Blank Tee T-Shirt S-5XL New
What stands out is the crew neck, which maintains its form after many wears.
Nike The Nike Tee Men’s Blue Solid Long Sleeve Crew Neck Logo T-Shirt L
This Nike T‑shirt has a subtle texture that adds interest.
Men’s Gray Solid Jersey T-Shirt, Crew Neck Short Sleeve, Size S Regular Fit
You will see that it’s unbranded, leaving room for your own accessories.