It was great, I did it every semester.
As a not young anymore childless expat adult with an interest in non-popular topics, I don't think that's a bad thing necessarily. While I'm surprised at the really bad quality (production but also just plain lies/propaganda) of some of the Prime content, I am happy that there's at least one streaming service were such content can be found because if that crappy content makes it to Prime it is a lot more likely that the non-popular stuff I really want is also there (at least, as compared to more heavily curated streaming services).
Of course, if your demographics more align with what is "popular" (and there's nothing wrong with that!) that may not matter and the negatives of having less filtering may be more of an issue. I will add that besides the weird/unpopular and low quality content, Prime tends to have a surprisingly good collection of (older) content, from Star Trek series to HBO shows (Sopranos, Tru Blood, Six Feet Under, etc), overall it's a pretty good service for the money and with the included 2 "days" (because lately it's more like 3 although sometimes it's next day) delivery it's unbeatable.
Time for a new pass time, watching TV isn't fun with this choice paralysis.
BlackberryOS and Windows Phone tried this tactic by offering incentives for developers to build on their platform. The result? A veritable deluge of Bible apps, dictionaries, websites wrapped as native apps, you name it. Both BB and Microsoft were so desperate to get the total app numbers up, they did close to no quality control, and pretty much every garbage app went through unless they had blatant copyright violations.
With user reviews eliminated from the big networks (I have Prime and haven't seen any user-written reviews in the UI), all we have to go on is the all-knowing algorithm to recommend what to watch next.