Hmm. I have an odd imagination, so people tend to morph, in my mind.
Feanor of the Peredhil is sometimes herself. However, she is quiet often imagined as the

or

smileys due to her overuse of them. Occasionally, when she is serious, she morphs into a (male) Feanor, mighty and wise and everything else the Noldor are, yadda yadda. When she calls me "m'boy" she is
Spike from Tom & Jerry.
Eomer of the Rohirrim is kilted. Duh. He has long hair and occasionally morphs into movie-Eomer. Quite often, I imagine him as the

smiley, with a stick body attached to it. I also cannot imagine him without a grin, whatever form he is in.
the phantom only has two real forms. One is his actual self. The other is his display pic, but darker and more mysterious.
SpM is simply his display pic. He never morphs. Occasionally, though, he wears a sophisticated suit worthy of a lawyer.