I hate hoods.
They don't fit in my bag, they are cumbersome, bulky and noisy rattling around in a pack..
I Always use a hood unless I am indoors in low light in which case it's 50/50%
Hoods do more than just reduce flare.
Look closely at the "tulip" style of hood.
They cut off nearly all extraneous light from hitting the front lens element.
The fact of the matter is that any light coming at any angle that hits the front lens element that IS NOT a part of the picture your making, will to some small degree effect your image. This is that "contrast" thing that people often mention. It's real. Hoods reduce this extraneous light dramatically.
Yes, you can go without a hood and still get really great results. Yes in many cases the difference may be hardly measurable, but to me that's all I need to know.
On a sunny day you can see side by side a dramatic difference between hood/ vs. no hood images.
The fact that it is most noticeable in these bright sunny conditions does not mean that the detrimental aspects of extraneous diffracted light is limited only to those extreme circumstances. In fact the same effect comes into play with any amount of light, though to an obviously lesser degree.
The hood stays on and I know my pics are better for it.
haha, laying down the law.
and yes, I do use a hood. all the time. Being poor I can't afford a new front element 




