A knitted afghan with roses may be gorgeous. Mine turned out pretty nice. But the trouble with intarsia is, it is never pretty on the back side.
With the first couple squares I was careful to twist my strands every three stitches, but I found that I actually got a smoother finish on both sides when I made longer reaches. After finishing, I really couldn't tell the difference between the squares where I went three, and those where I crossed five stitches ~ so it's longer reaches from now on for me!