Which Castle do you prefer to play as?

On large maps, 50 Golden Dragons won't play a significant role. On large maps, players usually don't control just one hero; they create additional heroes – "support" heroes – who help to defeat the main enemy's troops. Also, there are too many castles on large maps, which results in a large army, so the amount you gather through diplomacy will be insignificant.

Added 3 minutes later
How someone plays is their own business; if you don't like that your opponent has diplomacy, play with a diplomacy-focused hero too. Otherwise, accept it. I know this game, but I don't understand the connection between it and your previous post.