I did spend a lot of time listening to the techno audio channel to blank out the rest of the plane and writing in my notebook, but my creativity was pretty shot throughout the trip. Probably the most creative thought was when I pondered what the world would be like if it was constructed entirely out of the lower case letter 'i', which in terms of fatigue-driven madness ranks up there with the time I went into crunch-time for so long I forgot how to read English.
I did however scribble down some ideas for novel game engine components, but the problem is I don't know how practical these would be. I ssuspect the only way I can figure out truly how to write a good solid engine is to practice with game construction. Also, given I'd like to use code reuse but I'm not that great at solidifying interfaces, I'll have a look into ways of designing messaging or event systems as a method for decoupling game engine modules.
The plan may change once I've had the chance to properly think it over. For now though I'm still operating on some random time schedule totally disconnected from the local one - I'm feeling like it's the middle of the afternoon, when actually it's past midnight.
Thought from trip as an aside: it's amazing how well random dance floor music can sync up with the in-flight movies on other passenger's screens. It seemed to go well with everything.