Nettles are a pain, but at least the pain goes quite quicky...half an hour for me, after a bit of terrible itching.
Mozzies are something else entirely. In Italy, a couple of years ago, the Italian Airforce went for the skin on the back of my knuckles. All the sprays in the world could not deflect them. I ended up with a whole load of big serum-filled blisters. Quite strange, but blooming annoying...they itched like Hell for two weeks and drove me crazy.
Give me nettles, any day.