i personally like Riften the best. It reminds me of laketown from the hobbit and its just really cool with all the canals and the lake right by it. I also like Markarth just because of the scenery, even though it is so corupt. I hate windhelm, its super hard to navigate and its just a dumpy peice of crap. Solitude is OK, morthal sucks because of the swamps, and i hate winterhold cause its so far out of the way to get to and you cant be there for 5 minutes without it being a blizzard. I like Falkreath and it has awesome hunting there, even though its always rainy and gloomy. Whiterun honestly is one of the better cities cause its just home and its the first city you go to.
