[andythemoron]

I use Jekyll for my blog and have found it to be pretty easy to work with for the most part. You'll probably get 40 other people on this thread also using Jekyll... Most also deploying github pages. I currently deploy my blog on Heroku because I had some familiarity with it after using it for a prior project. Heroku is also easy for deployment, but a free dyno might not suit your needs. (Oh whoops, you're wanting to host on S3...)

I don't have much experience working with CSS, and I generally hate doing it, so I looked around at various themes for some basic styling. I ended up forking a simple theme that I liked (https://github.com/renyuanz/leonids) and then tweaked with it a bit to fit my preferences. Some changes were needed, but the solid foundation made it much easier to make it look good on both desktop and mobile.