I too love the Urban Decay Vice Lipsticks and the 24/7 liners are among my favourites, especially Bittersweet as it goes with many pinky purple shades. I also made sure to back up Turn On as it was discontinued when the current line launched. I prefer the sleek Vice packaging whereas the MAC black bullets seem so plain and boring to me (but are lovely when changed to LE designs/colours). I do like MAC Pro Longwear lip pencils (I use More to Love regularly), but there are not enough pink/purple/mauve shades for my liking.I've almost completely moved to other brands now. I still use my MAC eyeshadow palettes (the custom neutral ones), but I haven't bought much in the last couple of years although I did some damage with the Fruity Juicy collection. Cardboard MAC girl palette though? Not interested. I wouldn't even get them for my teen daughter because of some of the names. I used to think UD and NARS had some sketch brand names, but these are worse.
Most of my new shadows are UD and Anastasia (went on a binge with their singles this summer) and Vice lipsticks are slowly edging out the MAC ones in my stash. I do still replace my favourite lip pencils as they run out (Chicory, Soar, Absolutely It, Half Red), but I have more 24/7 than MAC now.
On the plus side, I've hit pan on lots of e/s and quite a few blush. I'll probably replace the shadows, but not the rest.
I've been buying MAC for 25 years, and I'm not sure that I can say they're my favourite in ANY category any more. It's too bad.