The three default styles of bags available with Baggins are decent, but two of them are significantly transparent. This can make if difficult to view my bags, especially if any of the bag frames overlap other UI elements, and the "Blizzard" style is a bit large and clunky.

I also find it somewhat difficult to differentiate between my bags and my bank when using the "Blizzard" style, as the blue of the bank bags is so dark and similar to the dark grey of my bags.

My suggestion is to allow custom colouring and transparency (via the standard Ace colourpicker) of the bag frame on a per-bag basis. This would allow transparency to be adjusted to best suit the user, and custom colouring could allow better diferentiation of bags and their contents.

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NOTE: I do know of and use Baggins_SectionColor, but it doesn't suit the above needs as well.