This keeps the edge strong. Another grind is the saber grind which is a convex-type grind . The easiest grind to sharpen is the hollow grind but is the weakest of the three. I am a believer in the flat grind. If you like the pattern and the way it is finished then small welding flaws should be overlooked since no piece is going to be flaw-free.
Some people prefer a subtle pattern, others prefer a flashy one.
Several patterns are available so, once again, it is up to the collector to determine what they like as far as appearance goes. Evaluating the material chosen for the handle and how well this fits with the overall view of the knife is, again, a personal preference. In my view the materials chosen for the knife should go well together, i.e. fit with the motif of the knife and, for me, add a bit of zing. I do not use many woods, but when I do I prefer burled types if they are available. For a utility type knife, G10, micarta and carbon fiber all make great handles.