The openings will work, not that I would say they are favorites of mine. The idea of the opening is to get a playable middle game. White hopes to preserve a small advantage and black attempts to equalize. In the event your opponent lets you secure a major advantage in the opening you then need to convert it and secure the point.
Please note, no opening you play will give you a major advantage in the opening. If your opponent errs, and you exploit it, then you can have that advantage. An opponent erring is his misplaying the opening or his playing a bad opening. Of course if you err...
Any mainline opening is a good opening. What you pick is a matter of personal preference influenced by factors like time, style, etc.
I have a question - I have a couple of tournaments coming up and they have been studying all of my positions from my past games and I need some new material for example Tim McEntee taught me a couple of interesting openings like The Danish Gambit which I have used a couple of times on this site and the Polish Opening which I think would be a fun weapon of surpise.