Lately, I've only been buying LV. Honestly, the primary reason is because the bags are lighter than the average bag out there! I used to get into the big bag craze and I really love the smell and feel of leather, but it's just too heavy for me. LVs styles are fun and timeless and the canvas is just lighter than leather.
Also, the bags are durable and I actually like how they keep the older styles so your bag is never out-dated. I think it's fun that
Coach always has new styles every month, but the down side of that is when you carry a Coach bag a year later, everyone (well maybe just fellow bag-obsessed people like me!), knows that it's a year old. LV has had many styles forever and they still keep selling them, so your bag is never "last year".
The bags also retain their value fairly well, so if I want to sell/trade them for a new one, I know I'll get a decent amount back. This is probably due to the fact that they don't go on sale and the bags are made really well, so they last.