With simplistic design there isn't much that can be done wrong. This is a good thing. But OTOH in such case it's also hard to provide universal tips as tastes regarding minimalism and such are different across the globe. Therefore you cannot please anyone, but aiming for majority is achievable.
IMO in design one of the most important things is keeping, what I call, the C^3 rule. Design must be Clear, Consistent and Coherent. Creativity is not obligatory, may improve user experience, but may also worsen it. Be careful.
Clear meant as easy to follow and understand but also as tidy.
Consistent meant as lacking any contradictions but also as thought-out well enough to avoid any changes for longer period of time.
Coherent meant as expressing your product as unity, where all its parts conform to the same rules and contribute to overall look'n'feel (hopefully in a equal or similar manner) but also as suiting the content.
So let's check it.
C1. Approachable? Yes. Neat? Yes.
C2. Lacks contradictions? No, see qxb comment [1]. Future-proof? It depends [2].
C3. Cohesion? Yes with minor flaws [3]. Does look supports the text. Not everywhere [4].
[1] Beside "posts" looking like a link, its placement is also untoward. Why? Below "posts" there are dates. Are dates the most important parts of posts? No. So you have to fix viewers focus to the correct column, placing "posts" above titles.
[2] The question you have to answer is what you see in future in this blog. Will be there any non-date related pages like, let's say, "projects" or "photos". New sections in header will make it a bit heavier possibly even dominating over your above name.
[3] Your name is written lower-case, but post titles, showing at the same place (actually not exactly, which is another minor flaw) aren't lower-case.
There is also not enough room to breath below the post title. Another thing is "me"+"faq" thing. "Me" links to about page and "faq" is actually about you too. "cv" is again about you. And these links are too close of each other.
To deal with it you have several possible ways, e.g. 1) combining "me" with "faq" (incorporating /faq page into /about), so you'll have "me" "cv" or "myself" "résumé", 2) renaming these links to "who" "am" "I".
[4] Code snippets often does not fit in your text column, making it completely unbalanced and awkward. Wrap them manually (e.g. make 60-chars line a rule).