I think all suggestions have merrit, but I voted A.I., diplomacy and battle speed. These are my priorities; the first two because they cannot be modded and the third because it is something I really disliked about R:TW. The others would be nice too, but I can do without them. They seem to be suggested with a slow strategic game in mind, and I think the designers are actually trying to speed it up. Also, since I probably will be downloading a realism mod shortly after installing M2:TW, they aren't really important to me.