Given that you like horseriding and wearing jeans, would you say that the Western Clothing aesthetic suits you?
It does it the occasion fits.  I do have cowboy boots.
It's interesting that we think of jeans mostly as an America aesthetic, although most of America's supply of them comes from Mexico and China.
As does most everything... Are Levis made in the USA?
Though they were created at the start of the 20th century in America, they are mostly imports, as well. Do you find jeans to be a comfortable fit for horseriding, or is it mostly the aesthetic that you enjoy?
That makes me sad.  They are comfortable once the are broken in.  They are practical - tough and not easily ripped.
That's good to hear, they're also very affordable. Even very highly rated jeans can be purchased for under 25 dollars. 
I would like to get a jean jacket but spring is here.  Maybe next year.
That would be a good idea. Jean jackets can be difficult to wash without degrading the material, however. So, I wouldn't suggest wearing it where you may get it dirty.
Yeah and I would be concerned it may shrink too much.  I wore my last one for many years until it basically fell apart.