one of my obsessions has to do with comparisons/contrasts between non-verbal learning dis. and Asperger's. (self-diagnosed NLD; possibly aspie.) in text-book terms anyway, aspies seemed more inclined to develop one or two life-long passions; NLD's tend to rotate, etc.
judging by what i've read/seen by actual aspies, NLD's, this distinction doesn't seem important. from what i've gathered: hyperfocus is just the general rule, whether the interests change or remain steady over time.
video games... hard to stop playing, aren't they? logic puzzles and word puzzles can be a real time-killer too, IMO. (but i'm not sure either video games or word puzzles are completely unproductive. who knows?)
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punctuation... life is full of punctuation.