I absolutely love Euphorbias - whenever I am in a nursery I check to see if they have any and if they're the right price and I don't have one I will buy it.
This is Euphorbia milii - I have a red and cream one of these too.
My Nan had a huge one in her garden and as youngsters we were careful to avoid running around it as "Crown of Thorns" as it was then known was not to be messed with hahaha
taken with my LB Sweet 35