About 10: Amarige, Arpege, Dioressence, Mitsouko, Fidji, Vent Vert, Shalimar, Samsara, Jolie Madame, Paul Smith Extreme, Tresor, Je Reviens and Ma Griffe. The last 3 were gifts that I ought to give away because they smell proper rank on me.
I get really hacked off because they've changed the formulation of a lot of classic perfumes. The current Mitsouko is nowhere near as nice as the bottle I bought in the late 90s, and I have to put it on hours before I go out for a slightly weird, astringent note to wear off. The recent purchase of Vent Vert is much more citrussy than the ones I bought last century and present day Arpege is nothing like the old one.
I'm dreading running out of Fidji, as it's one of my favourites and I'm sure that it won't be the same when I buy some more.
I've almost given up trying modern perfumes. There seems to be something in them that smells sickly, like cheap sweets, or very synthetic on my skin. The Paul Smith was a big surprise. I liked it on a friend, tried it expecting it to smell vile on me, and while it smelled different on my skin, it smelled nice and old-fashioned, with that slightly powdery, orris root smell.
If anyone knows of a perfume that smells like Prada's Infusion d'Iris but lasts more than about 30 minutes, I'd love to hear about it.