Uranus in the 1st house as well, and its the best or second most dignified planet in my chart to boot. I remember JMG mentioning his Uranus in the 1st too, perhaps an angular, rulership, exalted, or amply aspected one could explain this tendency. Luminaries or many planets in Aquarius could also plausibly do it, though multiple friends have three of those and still got the shot, so its not a hard and fast rule.