I like that it's generally fast to set up, has decent documentation/tutorials available, and is priced fairly cheap (for small projects).

I hate dealing with config issues and error messages. I'm currently facing an issue in a CloudFront distribution at home, and just got done a multiday issue with an SQS at work. The queue thing was very frustrating. The organization has standards for what needs to be set up, like encryption, access patterns, etc. I asked the group that owns our tools related to AWS if they had a template that follows best practices that I could look at - nope. Ok, then maybe theres a project I can look at as an example that follows our standards - nope. So as someone with mostly a developer background it was a lot of frustrating trial and error to fix an issue that I didn't even create.