Well, to begin with, Uttarakhand has the highest per capita income out of any North Indian states except for Haryana and the NCT Delhi, both of which are obviously ahead because of muh NCR. Secondly, the state has the highest proportion of Forward Castes in the country, so there is less chimping out and bhim nig noggery.
Relatively high trust society and efficient bureaucracy and good law enforcement. The plains districts adjoining UP are kinda meh in those regards tho.
Also, weather. Dehradun is a valley and generally substantially cooler throughout the year compared to other cities in the plains. Dehradun and Nainital also have excellent schools and you can get your kids, if you decide to have some, into a school with quality education while paying very reasonable fees like 1500-2000 a month.
Cherry on top is that there's a whole bunch of hill stations to explore and chill out in. Unlike Himachal, most hill stations in Uttarakhand are not that tourist infested (notable exceptions being Mussoorie and Nainital).
Also, if you're not a Bhangi poorfag, you can marry a decent fair semi-mongoloid Pahari chick.