You're fortunately in a job where you have a great deal of freedom to dress as you please. At my university, folks run the gamut from sharp and distinctive to frumpy and cheap. But for me, I want to dress in a way significantly better than my students. Even so, I wear a wide range of clothes depending on season/mood; however, everything is something I feel I can rock and feel comfortable in. I rarely wear suits on campus; this isn't because I don't feel comfortable in a suit, but rather because the campus is less formal and I'd prefer to not look like an administrator. At least until I am one. The suits I prefer look 1000% better than even those of our administrators, so I reserve those for conferences and other formal settings. But whatever I choose to wear I make it a point to wear clothes that are a better fit and with nicer details, even if it's just a polo shirt and jeans. People notice, even if they don't say anything.