Here's one of the new Steve Barber samurai (yet to be released). This sculpt was a real treat to paint- I think my favorite to paint of the whole collection.
The sculpt has great sweeping planes of surface which are great for a beginner to try out different techniques (layering, blending and maybe some drybrushing.) But the sculpt also allows for the more experienced painter to add things such as flowers, prints and patterns, mud splatters etc. on the samurai's clothing.
The only thing I caution against the novice is that the katana blade is a separate piece and may take a tiny amount of drilling and filing to get a snug fit, but the blades are beautifully shaped, so a little effort is worth it. Or you can just do what I do and hammer out your own blades.