[sfem]

What do they feel like? For the most part, like Pansy-mae says, they are just there. You're not consciously aware of them unless you do something to squash them, or move them. You notice your arms against the sides of them when you do things in front of you with your arms. If you move quickly, like stair climbing or running, you are aware of them moving. If you aren't wearing a bra, the movement can be uncomfortable. It isn't a sexual feeling in any way, for me at least. If your clothing isn't big enough through the chest, you feel it lightly restricting you. No different than restrictive clothing feels anywhere else on the body though.
Have I changed my mind? Not a chance. Like Pansy-mae says, they are just right.