Hipster-ish answer, but awesome band T-shirts. I spent a decent time of 2004-2012 going to many small venue shows, (Middle East in Cambridge, TT the Bears next door, Great Scott in Boston) and band t-shirts for the smaller bands were $10 to $15 true to fit, American Apparel off-shoot with awesome artwork. I feel like since 2013, band shift design has been getting worse and worse and the last 2 years has been the very lazy album cover printed on T-shirt or other album art just printed on the shirt. Also, band emblem on the upper left chest in small logo and some sort of album art on the back. Shirts have been getting thicker and stiff.
I was talking to a friend of mine that was in a moderately successful band in the 2000's and he told me about "360 deals" bands are "offered" now and part of that is the labels doing the merch and just doing shitty, quick designs.