Guilty.
I have the small soho hobo in 4 colors, red, pink, plum, and teal. I also
have the small hobo flap in 4 colors, lilac, black, amethyst, and ivory/white.
I like having bags in different colors and the hobos are the best fit.
i personally think that is unessecary and a waste. but unless im freaking loaded i'd buy them in every color they got. lol =D but if you like it and got the budget go for it!
If you really like the style and are really sure about the color then I dont see any harm in buying more than one of the same kind...as long as you use it!