So I finally got around to seeing what the fuss was all about with Attack on Titan anime series, by marathoning it in two days, and I am glad I did. Do note that I just finish watching the anime series only, so if it's answered in the manga, please indicate spoilers.
The thing that stood out for me though was the complete absence of Eren's father after the first two episodes, and the fact that no one seemed in the least bit concerned. We know he was (probably) not dead, because in the second episode, he was seen riding back home concerned about whether his wife, Eren and Mikasa were safe. In Eren's memories, he also seemed to be aware of what was going to happen (or saw it as inevitable), so it seemed unlikely that he had been killed, particularly with no mention of it.
However, aside from some recurrences of Eren's dream/memory, there was no sign of his father at all, and nobody seemed to care. Eren and Mikasa didn't mention or even recognised the absence. And the various soldiers, generals, etc. didn't seem interested either, even though Eren made it clear that his father had something hidden in his basement, possibly related to his ability. I would have thought that someone would have interrogated him further on what his father was doing or what could be in the basement. All we seem to know is that he had been traveling somewhere for a week or so.
Is there an explanation as to where Dr. Jaeger was during the 5+ years? Is it just an oversight that Eren's father is so glossed over by the series? Seems kind of weird when he's potentially a crucial character in the same vein as Annie's father.