I came 2003 for /b/ which is practically 9gag with older people and stayed for /fit/, which is pretty nice and I have the feeling the boards don't overlap that much in terms of users.

But many other boards are full of hate.

/k/ and /pol/ is full of racists.

/r9k/ and /v/ is full of misogynists.

and many boards are filled with homophobes.

Nicest board I visit was /ck/