D&D 3.5: Limited experience at best. When I play casters, I tend to stick to a theme, and as such I am never anywhere near as versatile as other casters of the same class. My only level preference is anything not Epic.
Pathfinder: See D&D 3.5
D&D 5e: Fairly experienced, for the most part.
Shadowrun: 5e, fairly well-versed in the astral stuff, and can run a good [insert Awakened thing here]