What application is a "must have"?

Since I was interested in hackintosh as checkra1n JB release.

I sucessfully achieved razer blade stealth(2016) to set up hackintosh by well-made guide.

After stabilizing the laptop with intensive studying DSDT patches, I fixed trackpad and battery.

*Sidenote: sleep function seems impossible to fix with my knowledge.

Anyway, by using first macOS in my life, I have to adopt many things especially key combinations.

Then, I want to know what apps will improve my macOS experience.

I researched but many sites seem advertising paid apps, and I don't want to spend money unless I know the app is really improving quality of life.

I would appriciate your tips for good applications!

P/S: Since I am noob, I am concerned about potential problems such as logging in itunes or any involvement with apple id because my hardware made up with randomly generated IDs and serial #. Is it okay to use my account to use them?