I think it totally depends on your style! I love the LV monogram, multicolor, cerises, and mini styles. I personally don't like damier, but some ladies on this forum love it, and some ladies hate the multicolor. As far as which bag to get, I'm personally eyeing these two. Good luck with your LV bag search!
I own a monogram canvas backpack, epi leather Lussac, multicolor mini hl, and cerises pochette---four different styles. They all have their drawbacks. The regular monogram canvas style can be too plain sometimes. The regular epi leather is very stiff. The multicolor in white is a dirt magnet. The cerise can look like a kiddie bag with the characters, but gives the plain monogram canvas a little personality.
Regardless of the matter, my heart will always belong to my first LV, the monogram canvas ellipse backpack. It's practical when I am shopping; has a great style; and comfortable and durable when in use.
I really like the monogram canvas, because to me it's a classic. I have the Batignolles Horizontal (my first LV bag and the one I use the most ) a Speedy 30, and recently bought a Petit Bucket which is great for weekends. If they get the Damier Speedy in the LV boutiques here in the states next year, I might have to get one.