Out of all I've listed
I like the following:
Dire Wolf, Blood Asp, Kingfisher, Executioner, and Warhammer IIc (in no particular order)
my comments on the Assault Mechs:
* Blood Asp -- Great Assault mech. Alt Version B is a good variant. Fielded commonly by Star Adder (to insult Blood Spirits

)and I've heard rumors of them being fielded by Federated Commonwealth
* Blood kite -- Decent Cheap mech fielded by Blood Spirits. They would normally field the cheaper mechs.
* Dire Wolf -- Iconic, bad to the bones, Assault Mech.
* Executioner -- Excellent fast mech. Several Khans have fielded this mech before
* Gargoyle -- Excellent Fast Mech
* Kodiak -- 2nd line mech. Not much comment about it.
* Kingfisher -- Alt Variant C very good endurance mech. Fielded by several clans. Cheap enough for Blood Spirits to even field.
* Marauder IIc -- Not much to comment here.
* Naga -- Arty mech
* Stone Rhino -- Not much to comment here.
* Supernova -- 2nd Line mech
* Turkina -- Probably least favorite of them all. Walking platform with very slow running speed.
* Warhammer IIc -- Warhammers always have a place in my heart
* Warhawk -- Decent mech. Scary 4x ERPPCs but overheating is a major issue. Alt Variant C is nice