This is more of a comfort thing than anything. I am normal in a t-shirt and workman trousers. The trousers are more for the pockets as there are more places to put battery’s and things I need for the shot. These days I have to chose what sort of bag I need.
The reason for different bags is what I need to bring to the shoot. Some shoots all I need to have is a camera and a flash light. Then on other side I would need all my flash guns and light stands I would bring my biggest bag. Which is on wheels, and can carry alot of differnet things.
I just like to wear confutable stuff and working other the years this is always good as I am not as not in these as I would be in jeans. which I do find a bit hard to find places to put things. Also this all depends on what sort of shoot I am doing. As I might have to wear smart clothes as I am shooting weddings, events or anything that looking like a worker would not be good.
As you can read I like to be me when shooting.