As for me, oh, my list could be ENDLESS. It seems that everything I fall in love with gets discontinued. Shoot, the list of Bath & Body Works fragrances alone would be pages long.
B&BW: Limelight, Happy Daisy, Freshwater Cucumber, Citrus Punch, Sunshine & Breezes, May Bouquet, Blackberry Amber, Pear Blossom, Breathe Calm, original Freesia, Tutti Dolci Lemon Meringue, Fresh Ginger Lime, Breathe Energy
Daily Defense shampoo/conditioner. Smelled AMAZING.
Not a beauty product, but damned if I don't miss Planters Cheez Curls. SO much better than Cheetos could ever dream of being.
Burt's Bees Pink Grapefruit Complexion Mist
Gap Day perfume (also Truly Devoted)
This hair perfume/refresher-type stuff...I think L'Oreal made it. It was meant to be used if your hair needed a fragrance pick me up (like due to smoke or whatever) & came in 2 different scents; I used the one in the blue bottle all the time just because I liked the scent. I still have some left, but once that's gone, it's gone forever.
A color of L'Oreal nail polish that I believe was called Venus Pink...it was out many years ago and was the absolute perfect watermelon-y pink with gold undertones. GORGEOUS. I've been looking for a duplicate for years and have never found one.
Gatorade Fierce Lime flavor. Loved that stuff.
Nabisco Bacon crackers
McCormick's Spicy Caribbean 30-minute marinade. Was WONDERFUL on shrimp, and when my brother and I did a mktg tour promoting their stuff as well as 16 other BBQ-related products, people went CRAZY for pork cutlets done in that marinade and then basted with Cattlemen's Honey BBQ sauce. It was wonderful.
Budget Gourmet beef stroganoff entrees. The recipe changed when Michelina's took them over, and they SUCK now. I used to be addicted to that stuff.
Campbell's Meatball Alphabet soup. It was my favorite soup EVER as a kid, then they discontinued it. Some years later, they brought it back for a brief period of time and I was ecstatic--my mom bought a few cases of it for me. Then, of course, they killed it again. I've written to Campbell's about it and they sent me free coupons for other soups, but dammit, that's not the same! Oh, and speaking of soup--I also loved their Three Cheese Mushroom Ravioli soup that was part of the "gourmet"-ish line that they still have out, but that particular flavor died out maybe 5 years ago or so.