From what I can tell you generally like to team fight rather than duel/split push.
You also tend not gravitate to high mobility champions for survivability rather you look for tankiness/utility to keep you safe. For example, Sion is a tank with high hopes and a shield, Vladimir's passive gives you health and he has life steal in 3 of his 4 abilities and orianna has a shield and small Ms boost when she uses w on herself.
You also generally seem to prefer large aoe damage rather than single target assassination (akali, talon, zed) or focus (irelia, fiora, renekton).
Lastly, from what I can tell you like passive farm laning champions that scale well into late game (Sion becomes an unkillable monster, Vladimir becomes the God of AOE and orianna's utility and damage scales incredibly well)
So the common trend:
- Aoe damage team fighter > single target burst
- Tankiness/utility > mobility
- Scaling champions > Early Game Bullies