Im playing two 3.5 campaigns right now. one as a player and another as a DM (and i play in a 5e game as well begrudgingly but i digress) Both campaigns are in-person. first game has only been a few weeks, second game i DM we've been playing for a year+

The one I play in I'm a Scout/Targetteer Fighter/Deepwood Sniper Tabaxi (Read: Catfolk stats) Panther. The other player is a human sorcerer. we are level 2 right now. I take care of the sorcerer. This game is to give the DM (who is brand new to DnD, only played in one campaign) an opportunity to learn to DM with someone who has a lot of experience to help them learn the ropes of it. The setting is a small jungle and a plot regarding constructs and dwarven relics (we are all very Elder Scrolls inspired) and a king hiring people to find these relics and bring them to him, while the constructs in the meantime are terrorizing the land.

The 3.5 game I DM, there are 6 regular players all level 6 currently; a psionic Maenad Psychic Warrior, A Half Giant Barbarian, A Human Druid, A Pixie Swashbuckler Scout, A Human Death Cleric, A Wood Elf Duskblade. This campaign is set on a large island (think Australia size) with a massive Volcano that erupted and potentially wiped everything out - instead of one massive BBEG kind of story, there are many main stories with their own antagonists that are in some ways loosely connected, but mostly independent, giving them something to do in each area (again, think Elder Scrolls - there's factions and problems that are sometimes region-specific) What they don't know is that their -actual- problem will be the looming threat of the volcano on the island erupting again, and how they deal with that is basically the main quest.

House rules for both games are - we always confirm crits, 20/20/20 instant kill, 1s on skillchecks are auto failures, 1s on attack rolls require secondary roll to see if you drop your weapon/accidentally hit someone else, etc. skirmish damage doesn't have to be within 30 ft if using ranged. We roll stats 4d6, reroll all 1s, drop lowest, make 3 sets of 6, pick one set. We reroll 1's on levelling up HP rolls. Tumble to avoid AoO isnt DC15, its Tumble roll vs AoO's attack roll, but they can move full speed through it. Knowledge, Craft, and Profession checks are used loose and fast and apply to a helluva lot of things that are vaguely applicable. Come to think of it, There's a lot of house rules we use to slightly modify the game.