Sorry for the delay in responding!
The halo of a saint signifies the radiance of holiness. We can compare it to:
- Moses in Exodus 34:30, when his face shone when he came off of Mt. Horeb, and
- Jesus during the Transfiguration in Matthew 17:2, where His face "shone like the sun".
Some Saints have radiated this glow in their lives as well.
Angels are depicted with wings to signify that they can move instantaneously and appear anywhere they wish at any time. Effectively, they are not subject to the normal constraints of space.
As for rosy glows, these are artistic license; I assume you are speaking of little infant-like cherubs. These are not biblical portrayals of angels and are merely part of secular culture.
I am not sure I understand your point about the number of wings vis-a-vis the "raw radiance" of the heart, but Scripture does seem to use star imagery to describe or identify angels in some contexts. But this would be the star itself, not the "shimmer" of a star.
Angels manifest in various ways. In Scripture, they typically manifest as men. The New Testament says "many have entertained angels unawares" (Hebrews 13:2) so we may not even know they are manifesting. Some people are more sensitive to angelic presence than others and may perceive them interiorly. I'm not sure a feeling of a presence of love or warming is a good sign, but I can't rule it out.
Angels are pure spirit, pure intellect and do not have physical bodies at all. They can assume a body when they need to interact with men, but they do not have their own bodies. They do have minds (intellects), and they are more intelligent and more powerful than we are. For more information, you may want to read the books