I go for maximum grip on the front and something more playful on the back
On my 26 inch bike I have a High Roller on the front and a Larsen on the back.
On my 650b I have a HR2 on the front and an Ardent on the back….I have also had a Trail King on the front and an X-King on the back…. and I’ve done similar with Schwalbe tyres with a Nobby Nic front and a Racing Ralph rear…. all good fun combinations where the back breaks traction before the front but in a predictable manner…. Not sure what I’ll do this winter though, probably go back to the road again until the trails are rideable in the spring!