I think that the depressions I've experienced, along with my younger shyness (still have it, but hide it well) and anxiety draws those people to me, as I can identify them quickly and I will reach out.

Toxic people, however, takes me ages to notice. I don't attribute collecting them to be from my depressions (although I'm sure that helps make me appear to be easily taken advantage of) but I attribute it more to a dysfunctional family and my thus distorted reactions, toleration, and low self-esteem.

Sometimes it overlaps, as some toxic people can also be depressed people.