This is a really good question. I'll say right off the bat... chreubs with wings and halos.. or any human with wings and halos... Not so much.
Now, I am a ceremonialist. LBRP at 20 paces and all. So I invoke the power of the archangels. And for visualization I go all the way. Michael: Big Guy.. flaming sword.
But belief... That's a different question. The concept of Angels in ceremonial magick, kaballah, and some biblical studies is sort of the middle management between the divine and physical world of existence.
You know I have enough problems trying to find my physical purpose and my attainment of a divine that transcends everything I might proscribe to it.
Now... There is the concept of the Holy Guardian Angel, I kind of view that as the first step to divinity beyond the perfection of self in this world. And maybe it is a separate entity or a projection of the divine that specifically deals with issues between me and the divine.... as opposed to everyone else.
As a kid I thought that Jim Croce was my guardian angel....
So... 93 == YMMV
I'm really not sure what's really up there beyond what I see. And I find the less I try to personify it, the better I begin to touch it.
Does that help at all?