"The untimely death of (friend/loved one's name)"
"My 'big move' from small town comforts to urban chaos" (and similar fish-out-of-water anecdotes)
"Love, and what it really means"
"How the sheer spontaneity of big city life has opened my eyes" (often occurring several weeks after the initial aforementioned 'fish-out-of-water' blog)
"Why I feel compelled to move to (obscure third world country) for xx months and do volunteer/missionary work", and
"Why the humble inhabitants of (obscure third world country) have it 'all figured out', and why we are so inferior in comparison".
The last two are often combined into a longer, two-part hybrid blog.