Saddlebags are a must for me. I can ride for fun whether or not they're attached, but the ability to carry stuff...my office work and supplies, groceries, adult beverages
, rain gear
...you name it, means I can use my bike for a lot of things instead of taking the car.
More riding = Good.
Plus, sometimes I come across something while riding that I'd need some luggage to get home...like those very tasty
ears of corn that I picked up at a farmer's roadside stand I came across.
They're easily removable, but I tend to leave them on except when I'm lubing or adjusting the chain.
At this point, I think my bike would look weird without them.
My bike is my horse. A cowboy who doesn't have saddlebags on his horse doesn't ride far, so I apply the same thinking regarding my motorcycle.
That's just me, of course.