why do we push start, coz we think prob is a weak battery, remember a dead battery wont start ur car even if u push it 100 miles down the st. we see numerous cases of this kind everyday.
Therefore, i'd say if u maintain ur car well then u'd not be worrying about a weak battery.
btw summers are approaching so u'd need to keep a close watch at ur battery fluid (acid battery).
i'd also suggest that dont push start ur a/t car, as u'd physically damage ur tranny when putting it into D from N. grrrrrr...rather jump start it.