Hmm. My mum always used to talk about buying "smelly stuff" for Grandma, meaning pleasantly perfumed products of one kind or another, and that didn't seem obviously negative to me. Mind you, I was nine; there might perfectly well have been a connotation that she didn't like the smells even if Grandma did...

Positive smell words: not quite a verb as you requested, but the one which springs immediately to mind is "redolent". "Fragrance" and "aroma"/"aromatic" might also come in handy.