Hi all, thank you very much for your so nice feedbacks!
I am really glad since it took quite some time to write, so it's nice to hear people find it useful.
@albedoa, I haven't paginated category pages yet since I don't have that many posts yet, but I think it is possible to do with a plugin that would generate those pages from a custom hash / data set, rather than what Jekyll makes available. I don't know if what I mean is clear but I will look into making an example.
@aw3c2, any web host will be good for Jekyll, since it's just static files that any web server can handle. As long as you are happy with the different workflow, you can switch without any problems. Actually, since your host has PHP you could use it for the contact form, as mentioned in the post.