What I am strict about though is what my character wears, where he goes, and what he does based on the lore for his race (Redguard).
Some example's would be:
1. My "hometown" is Port Hunding in Stros M'kai, anytime i do banking, crafting, or general downtime I do it there since it's one of the first spots where Redguards settled. When my 6 month sub kicks in i'll also be buying a home in town.
2. The type of character i play and the gear used i try to fit with the lore as best I can. Sword and board templar with a mix of redguard styled armor on my fixed outfit. As well as redguard style swords on both bars.
Not too much past that but I also try to avoid anything flashy or silly. It doesn't sound like a lot but when you try to be strict about certain things like that you realize how much it affects what you do and how you play.