I mainly play D&D5e but enjoy playing a variety of other systems, my real life group only meets once a month but we get a chance to play everything we can: Warhammer Hero Quest, AD&D, D&D4e, MechWarriorRPG, Golden Sky Stories, The Witch is Dead and numerous one-shots so varied I can't remember what they are called.
I DM my own campaign, a 5eD&D game inspired by the Malazan Books of the Fallen, that I create my own Roll20 assets for, and play in one regular roll20 campaign that i have been in for over a year.
I like play un-optimised characters in D&D. The Half-Orc Bard, Dwarf Wizard, Tiefling Barbarian, these are my wheelhouse. Character is more important than 'winning.' I have no problems with optomisers, I like to my the character I av built as good as I can with their help, so so long as they don't disparage the way I do things.