[Superb]

Reading through the posts here it seems like many women accept their partner's breast growth but I'm wondering if that's a 'whatever makes you happy' sort of approval or if they actually like it and find it arousing?

This is important to me as single guy now that I'm approaching the more obvious stages of growth. 

Any thoughts, experiences?

I never thought having breasts would be a problem.  At most I thought my SO would indifferent.  So I was very surprised when they grew to the point where they are very noticeable and she wasn't repulsed or even indifferent.  Instead they are a turn on for her.  I don't think a day goes by that she doesn't caress and squeeze them a few times.  I can't explain it and definitely don't understand what she gets out of it but I'll run with it for now.