A small grit in my daily mouse movements:
SC zooms IN by rolling the wheel away from the screen
Other software zooms IN by rolling closer towards the pic and not away from it.
Nothing wrong with either approach, just a matter of convention: MS Office, Firefox, File Managers including Win Explorer - all follow the 2nd approach. Reinforced by these programs, you habitually find yourself zoom-wheeling the wrong way in SC (or everywhere else if SC is your main hangout)
Bottom line of my fussbudget observation: It wouldn't hurt to bring SC in line with the majority, just for the sake of convenience.