Strictly for accessories:
1) Work bags and accessories - Vuitton. I have invested in several pieces from the eponymous epi range in black, including the Sorbonne for when I have my laptop, the Saint Jacques for when I don't, the MM agenda for organizing, the Cles in 4-key and the best wallet ever: the Tresor. I seriously adore Epi since the bags are serious workhorse bags: they last forever, are virtually indestructible, hide wear very well and are very discrete (unlike all that gaudy monogrammed pattern shit
). I also don't have any, but admire Bottega Veneta intrecciato pieces for this category - the leather is a bit too soft though, and I prefer Vuitton's more structured styles.
2) Weekend bags - Lanvin. Their styles are always really unexpected and different (and not overdone, overworn), the leather is great quality, and I love their signature medallion.
3) Sunglasses - All sorts. Probably Gucci for versatility, but I also own and love Chloes, Bottegas, Chanels and Gaultiers.
4) Boots - Lanvin, Tod's, Miu Miu and Costume National for day to day, Prada, Gucci and Ferragamo for work. Love and admire Isabel Marants as well as Margielas, but do not own any. Rick Owens has some lustworthy experimental styles as well. And one day I want a pair of Ann Demeulemeester biker boots, but I have too many shoes and too little space right now.
5) Flats and driving shoes - Tod's for comfort, Ferragamos for comfort at work, Jil Sander, Gianfranco Ferre, Balenciaga, Chloe, Celine for both. Lanvin flats are super well regarded in this category as well, but I haven't bought myself a pair yet. Also, I really love some of the Comme Des Garcons styles for play and Dries Van Noten for work.