Inspired by the thread about whether Superman's costume should evolve over time.
Across various continuities and adaptations, Superman has been depicted with a variety of costumes at the start of his career. Which among them would be your preference for his first costume in current continuity?
I personally lean towards a version of the Fleischer suit. It's associated with the Golden Age due to being from a 40's cartoon and does give a strong retro feel. Its close enough to the classic suit, but the logo coloring makes it distinctive.
As a runner-up, I'd go with the T-shirt and jeans look for Superboy flashbacks.