Depends on the situation:
1. On my Wave in my soi - glasses, no helmet, shorts, flipflops
2. On my Wave running around pattaya - glasses, cheap helmet, shorts, flipflops
3. On my big bike running around pattaya - imported Shoei race helmet, jeans, riding gloves and shoes.
4. On my big bike touring - full riding gear even in the heat of summer.
I guess I am lazy, I am not spending 20 minutes getting dressed to go to 7 and get a beer, but an all day ride I couldn't imagine not having all the gear on.