[Baypiggies] Should I install brew under /usr/local or /opt/local, on Mac?

[Stephen]

Seeking quick opinions on a marginally Python-related question:
I decided to move from macports to brew.Should I install brew under /usr/local (default) or /opt/local (said to be better for separation)?- I'm on MacOS 10.8.x- I want to have multiple installs of Python 2.x, 3.x and various other libraries  and tools (octave, Vowpal Wabbit, word2vec, Spark etc.)- I don't want any grief from Mac system libraries, version dependencies, etc.- I read StackOverflow et al. and there is no clear consensus
Thanks,Stephen 		 	   		  
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