My personal opinion. (Don't take offense please) You are missing out man. I grill over open flames/real wood that has turned to embers any chance I get. Not only do I get the extra flavor without adding chunks to charcoal, it's just fun.
To each their own though!
I agree 100%, Rob. My main grill is my Genesis EP-330 (before that, an E-310). I almost always use wood chunks regardless of what I grill (pizza, meat, veggies, quesadillas, portobellos, anything). People have been cooking over wood since the first fire -- charcoal needed technological development (no not briquettes, learning how to burn airless to create charcoal). As long as there is good airflow, there are no issues with using wood. Ever seen the ads for "wood fired" whatever?
I normally use wood chunks from about 1" to 2" on a side resting in an uncovered "smoker box" right on the flametamers under the grates. In my experience, soaking or using wood chips is just a waste of effort. (To each his own.) Set the appropriate burner(s) on Hi and heat untill the wood starts smoldering, then turn it(them) down to prevent the chunk from flaming and for your grilling. Each grill will have its best positioning of the chunks and heat to get them going and continuing -- you just have to experiment some.
I've also had success just wrapping the chunks in a piece of HD aluminum foil with holes punched in it.
As far as the woods, avoid any use of evergreen woods like pine, spruce, etc. (Using cedar planks is a totally different method of grilling.) Mesquite can be good if you like it, but can be too strong for small pieces (even burgers) or light flesh (chicken and fish). I personally like oak and cherry best. Most nut or fruit trees are good, but avoid black walnut.
As a woodworker, I cut my own. Find a friend willing to keep you supplied -- it beats those expensive bagged woods. Some criticize old, dry wood, but I haven't found any problems or lack of flavoing.
Rich