Since I started this thread...I will add to the "stir" a bit.
Rex and Asmala: Iron! Solid! Steady! (perhaps a few surprises but straight-forward play...till gambling is needed...

)
Primitive: Steamroller! Watch out! (a bit vulnerable in the "endgame")
Geoschmo: Danger! Watch out! (willing to take a look at the opponent and decide to try something unconventional)
Who would I like to play with? Well, besides my current challenge involving Alneyan...whom I consider as calculating as Asmala but a bit more chancy (hehe), my choice is Primitive. Not sure what it would be like to work with him...but I'm sure it would be a rollercoaster! Second choice? Geoschmo. For a rock-steady game...Lord Chane (who, I swear, has a SE4 rating less that what he deserves).