noisy, attack people without a reason, kill other smaller birds, eat their eggs and nestling and take over their spot. I used to live in a neighbourhood with such a beautiful birds, now Crows took over an all I near in the morning is CRAAW CRAAW
Live in Davis next to an active freight train track that shakes the ground and tens of thousands of crows landing in the trees in the evening, hundreds per tree, then let me know how you like that. :)
They basically always have a good reason to attack people. If you get attacked by one, it's up to you to figure out why and then not do that again.
A lot of the time it's because you are getting too close to their nests during nesting season. Just take a different path in spring and let them look after their kids in peace.