I like to read at least a computer book every 2-3 months, that makes around six books per year. This year was a very unluky one for me, due to family and personal wealth problems and surgeries. However I'm back on the rail of reading computers book again, and Perl is the predominant one this year.

It's not that I don't see the utility for one-liners, it's just my own mindset that seems to prevent me to use them.
On one hand, I often explain to other (non-Perl) developers how useful can be a one liner, but on the other hand I tend not to use them even when I could.