Hopefully this will be a place for players to design and gush some specific creative ideas and hopefully a place Blizz designers and developers can come to look for ideas and inspiration.
Please remain positive of your neighbor's posts as well as in your own. These designs aren't necessarily going to be good or balanced it's simply a community designing brainstorm session.
Now devs have already looked at thorns and are looking for ways to buff the affix to make it useful. http://us.battle.net/d3/en/forum/topic/7895009644#4 but i'm sure the communities designs will give them more options to look at. Since some community designs have made their way or are making their way into the game I think we can add real value to the game by doing this. Can't wait to see what everyone else thinks of.
So here's a few to start:
1. Thorns deals increased or bonus damage based on primary stat. (or based on armor? or vit? that might be interesting)
2. A % of your total thorns damage adds either flat or % damage reduction. (not bad since if you have a thorns build you are likely wanting to be tanky anyways.)
3. Thorns damage has a chance to crit and gains a proc rate. (Now thorn damage would trigger things like LoH, chance to freeze etc.)
4. Combine the affix with another item affix for example: "+200 armor and melee attackers take 800 damage per hit".
5. Your turn.