Discover was my first CC. I got it, (along with a T-shirt and Waterbottle) during my Freshman year of College, in 1991. I had no credit hx to speak of, but times have changed.
I do find Discover to be much more conervative than most lenders. I started out with an initial credit line of 1500. At present, my CL is 13,500. It has not grown as rapidly as many of the other cards that were issued to me during the same year/timeperiod, despite heavy PIF usage. They also soft me on a monthly basis.
I'm not complaining, as I don't need any more credit than what I have.
I like the cashback feature, and the customer service is better than most.