I have an exact Trine from Mercury in Scorpio to Uranus in Cancer in my 3rd. I have always believed it helped me learn Astrology at a young age.
One of my favourite Astrologers, Bob Marks, describes Uranus aspects pretty succinctly:
https://www.bobmarksastrologer.com/aspectsuranus.htm
Uranus can make other planets function crazily. It can make them seem hyper. Whatever Uranus touches will not function in socially acceptable "normal" ways.
Uranus Aspecting the Sun: Gives independence and the desire to do things "differently". When positive, brilliance to the point of genius. When negative, it can make you an eccentric who delights in shocking people, or just plain crazy.
Uranus Aspecting Mercury: Give a mind that is attracted to the new and unusual.
This combination increases brilliance, flashes of genius.
According to C.E.O.Carter, the harmonious aspects (60 and 120 degrees, the sextile and the trine) are common in the horoscopes of astrologers. Well, I have a trine, at any rate.
The stress aspects increase the stubbornness. These folks have to learn to keep an open mind a little longer than they usually do before making it up because, once their mind is made up, it seldom changes. They can change their own minds several times a day (especially if these planets are in mutable signs) but no one else can change their minds for them even once.