Well when a question of what advice to give on
maintainability came up on perl5-porters, the most common
response was, "Tell them to use parentheses." In fact
perlstyle also tells you not to omit unnecessary
in reply to A question of style
Personally I tend to not want to worry about predeclaring
functions with strict, so I use & and parens. YMMV.
My other differences from perlstyle are that I tend to
use a 2-space indent to match co-workers
rather than the 4-space indent in perlstyle, and I am in
the habit of using redundant punctuation.