Titles says it all actually but for the sake of making things cleaner, let me explain what i mean be "RP Server".
1)No lore breaking names. You have to name your toon, appropriate for your faction and race.
2)Races locked to alliances. No Altmers in Ebonhearth Pack starting zone.
Edit:How about not having locked races, but if you wander into different faction's land all the NPCs become hostile? You can't get more immersive than that.
3)No playable Imperial characters. 'Nuff said.
3)No lore breaking discussions on public chat channels. No more "who is the best Twerker" discussions on /zone
4)Opposing faction players can kill eachother wherever they please. Think about the joy of sneaking behind Aldmeri Dominion players while they are raiding, and smashing them between the boss and your Daggerfall buddies!
Edit: I what i meant by wherever they please was not that another factions players coming to your welcoming/training island and laying waste to all the low levels. I was talking about having PvP enabled in the Cyrodil dungeons.
5)Factions "voting" for their emperors/leaders. Not the one who killed most enemy players, but the one who led your faction to victory will be the Emperor of Tamriel!
That's it for now, if you have other cool ideas, lets add them too. Who knows maybe someone from Bethesda will read this thread and make some of our dreams come true!