Personally, I've never thought of them as smelling pleasant; just stronger or not so strong. And, I've always used enamels and lacquers which have the heaviest fumes.
That said, I do have a "fondness" for the smell of paints, thinners, and glues; but I think it's simply because I associate them with the fun of model building; not with any direct olfactory stimulation.
To paraphrase Robert Duvall in "Apocalypse Now"...."I love the smell of Dull Coat in the morning"....
GIL