I could talk about D&D for hours, I play 2-3 games a week (I DM one and PC in the others, all 5E), but my favourite thing ever is the yearly event in the UK called Fantasy Forest.
Hosted at Sudeley Castle it's the biggest outdoor festival for all things fantasy - I'm really hyped to be going again this July.
Last year I went as a dark wizard cosplay with my partner as a druid.
This year I'm doing a Geralt TV-style cosplay and she's going as a mushroom druid haha.
A bunch of people from our D&D games are also coming, some will be meetings for the first time ever in person which is awesome, and they've all gone crazy about the cosplay.
One of my friends bought proper chainmail to wear and is going as a dwarf from LotR with full gear.
This probably sounds like an ad now but I promise it's not :D highly recommend it though.