Tell us about yourself!
There are those who are required to use IEEE spec symbols, others who have to use other standards. In general though, unless a company one works for requires the use a specific set of libraries, it's "use what works." (as long as it's accurate and uses the proper terminations for connecting to other elements.)I've created many schematic symbols with inputs left, output right, and some with a mix. Personally, when I create a schematic, if it's not a large circuit, I prefer that there are a minimum of crossed lines (easier readability), so that consideration may apply to this or that schematic symbol used. This generally is for elements in which there isn't already a stock symbol. If there IS a stock symbol I usually use it unless it's use woudkl result in a real mess.
+1 very nice overview/primer for the novitiate machinist.