I really like the clan of horses because their one of the most balanced clans in the game in terms of economy and warband balancing. Theyre a little boring compared to others but they have some really nice perks such as easily accessible unit upgrades, 2 warlords that only cost gold and you can assign these warlords to do tasks like mining and building while not in battle
The biggest strong point of horse though is due to their balance you can aim for any victory you want without much trouble, highly recommend