Chanel bags: What catches your eye and makes you buy?

I like bags that are functional which i can safely enjoy without having to baby too much. I have 2 precocious boys to attend to already...lol

Colour! I love intense saturated colour. Deep rich colour captivates me!
 
It HAS to fit over my shoulder - not as easy as it sounds as I am not a petite lady by any stretch of the imagination:nogood:. I can't be doing with carrying bags as I need my hands free.

It also has to be easy to use, one handed opening is great. Flaps work SO well for me.

I'm also rather partial to chains ;)

And the feel - I haven't got a caviar (yet) for this very reason. Lambskin or soft, soft leather.

Colours - haven't got that far into my obsession yet, but would kill for a lovely purple and a red. (I don't like the dark colours this season)
 
Chains
Durability
Over the shoulder/Functional
Color

I don't know what Chanel bag fits this criteria (I only have a pink PST, so far:graucho:) but I am on the hunt to find the perfect Chanel for me.....
 
1. What type of chains and it need to go over my shoulder ( have 2 little girls )
2. Color
3. Size
4. Price ( this should be first but if I really love it, sometimes price does not matter )