Going back a quite few years the CV880 and 990 had opposite MLG bogie tilts similar to the 757/767. The 880 had a normal nose up tilt and the 990 a nose down tilt.
The first stage of retraction of a 777 MLG reverses the nose up tilt to a nose down tilt before retracting the gear.
Invariably the direction of bogie tilt is simply to fit the gear into the smallest possible wheelwell.