I'm with Trog.
Helmet (half-shell) all the time.
Jeans, boots and a shirt at the very least.
Usually a leather vest too and leather gloves but it's already getting toasty so those may be shelved for the next few months.
Winter months = tshirt, thermal shirt, leather coat, jeans, leather chaps, glove liners, insulated gloves, boots + 2 pairs of socks, neck gator/face mask, ski cap...
TMI?