I think that the quality of LV surpasses most of the other brands. I also have a few Gucci pieces and they are nowhere near as durable as monogram canvas. I had a classic gucci tote on which the fabric started fraying within a year and the leather handle started peeling as well.
In addition, LV is at a level of exclusivity that (in my opinion) is only surpassed by Hermes and the other super luxury brands. This isn't one of my reasons for choosing LV but for some others it may be. The fact that LV never goes on sale, for example, and that the bags hold their value extremely well, can also be additional reasons. I have seen Gucci bags go on sale for 40% off within a season of their release.
I personally just love its style. It's emblematic, matches with everything, stands for good quality and the finer things in life, and the styles are so cutting edge (there's more to LV than just monogram canvas). I could go on and on...

Don't worry if you don't "feel the love" for LV though! I have tons of friends who prefer Chanel or Dior for example waaaaay over LV. We can't all like the same things. Plus Gucci has some hot stuff too!