We present sufficient conditions on the existence of solutions, with various specific almost periodicity properties, in the context of nonlinear, generally multivalued, non-autonomous initial value differential equations, du/dt(t) is an element of A(t)u(t), t >= 0, u(0) = u(0), and their whole line analogues, du/dt (t) is an element of A(t)u(t), t is an element of R, with a family {A(t)}(t) (is an element of) (R) of omega-dissipative operators A(t) subset of X x X in a general Banach space X. According to the classical DeLeeuw-Glicksberg theory, functions of various generalized almost periodic types uniquely decompose in a "dominating" and a "damping" part. The second main object of the study - in the above context - is to determine the corresponding "dominating" part [ A(.)](a)(t) of the operators A(t), and the corresponding "dominating" differential equation, du/dt(t) is an element of [A(.)](a)(t)u(t), t is an element of R.