I'm (quite obviously) newer to this, I'd say probably comedy/slice of life comics like Adventures of God and Mondo Mango around 2015.
The odd one out during this time would be Hearts for Sale, which is probably the first webcomic I completed (though to be fair, it was 1. Done by 2015 and 2. Fairly short.). I think I read all of them somewhere other than their host sites though, maybe Imgur or Reddit? Idk.