JNCO jeans are one of my favorites. What's nice is that they go on sale for $65 pretty often which is when I recommend to buy them. Spending over $100 on a pair of jeans for skating is just too much, but $65 is a lot more reasonable. Their fit is really nice. It's fitted in the waist, but baggy everywhere else. It's super nice if you skate with a wallet in your pocket and don't want to feel it at all. The pockets are really deep too which makes carrying bigger phones and stuff a lot more comfortable.
I'd recommend getting the 169 low down since they are the least baggy with a 20 inch leg opening. If I were to say a negative, it would have to be that they aren't tapered at all, so if you skate with slimmer shoes, they're probably going to get caught under your shoes quite often and get torn up. But if you skate bigger shoes like Globe, Etnies or DC, you should be fine. Other than that they are extremely durable and hold in the heat well for winter skating. In hot summer they can get pretty warm though.