One word of warning... keeping an open mind to find possible images is very useful; but also, you should also take regular breaks.
The mind can obsess when one finds mastery with a new thinking pattern. Pareidolia is great for being artistic, but it can be annoying when you can make out shapes in real life. (I think that's what Jonathan Blow was commenting on in the final scene of the game 'the witness'. In his case, it was about habitual application of pattern recognition rather than Pareidolia, but the same theme holds true.)