At present i really have a preference to fantasy grounds but the main reason for this is its.. well... pretty. Do you have any plans of altering the UI? Although I never have DMd with roll20 or fantasy grounds for that matter im guessing your learning curve is better than FGs. Having said that it puts roll20 in an advantageous position. I hear FG had bought out another gaming company of somekind that was dabbling in 3d. When i think computer gaming of RPGs i remember bauldurs gate so im not sure how feasable it would be to incorporate graphics like those? Maybe hooking up with hero forge to allow players to purchase custom 3d characters for said enviroment?