I've always been a support type player when it comes to cooperative games. And when I have to play solo games I enjoy utility type mages. Supporting my team is where I derive a lot of enjoyment, being able to tip the scales in our favor and all that. Occasionally I do love roguish and stealth types.

For MMOs, I played RDM and BLU in FFXI for their support capabilities and wide range of skills. And HW/SB AST was pretty much built for me with the variety of buffs and enfeeblements it had in its kit. I've found that I enjoy DNC now to scratch that particular itch.

In ARPGs I find myself playing things like Wide Range Sword and Shield in Monster Hunter and status based builds to debilitated the monster during hunts.

In traditional turn based and tactical rpgs, classes like Darkest Dungeon's Antiquarian, FFT's Mystic, Triangle Strategy's Tacticians, Fire Emblem's Dancers, and Unicorn Overlord's Arbalests are my favorite type of units. Classes that really set you up for success or offer great utility and defensive capabilites.

And my tendencies really come through in TTRPGs. Artificers, Druids, Wizards, and sometimes Rangers are my bread and butter classes. Treantmonk's "God Wizard" from the old 3.5 forums is closest for what I strive for. My build typically excel in battlefield control, enemy enfeeblement, ally empowerment, and utility needs. Beyond D&D I've played things ranging from a Spider in Blades in the Dark (someone who weaves a web of connections to pull favors for the gang's advantage) to the Thaumaturge from Pathfinder (an occult knowledge class that takes advantage of foe's weaknesses and esoteric knowledge).

My favorite character from my D&D 4e days was an Artificer/Swordmage Dwarf named Morrend. He gave himself and his allies large amounts of temporary hit points, buffed his hammer for melee, buffed his allies' attacks, reduced enemies chances to hit, reduced the damage allies would take from enemies, healed a bit, and made utility items for the party. He was such a fun unkillable ball of health. I had to make someone who could survive dealing with a party of nothing else but squishy casters and no other frontliners.