I use Eneloop batteries. They are widely regarded as the best quality and I have never had a problem with any of them.
The only controller I have that uses AA batteries is an Xbox controller. I am a fairly light gamer, so I have never measured how many hours they last, but I have no complaints about battery life. I often get more than a month of use before needing to charge them, so I would easily guess at least 10-20 hours of battery life.
There are rechargeable AA batteries. I prefer this over built-in batteries because I can swap the batteries out immediately instead of waiting for the controller to charge. It is also cheaper and easier to replace the batteries when they eventually begin to wear out.
Thunder is not in the official F-Droid repository. It might be in a third-party repository such as IzzyOnDroid.
This works for cases where just being a member gets a lower price, but at least some stores have digital coupons that need to be added to my account. This would not work with a generic card. It is definitely a good tip for stores where it does work though.
Grocery store rewards programs. I know they are designed to link purchases to me, but the financial savings is worth the loss of privacy for me.
I really like Filen. They have an open source app on all operating systems, including Linux, which Proton Drive still does not support. They also recently added support for Rclone.
Signal still requires a phone number. What was added is usernames for contacts, so you no longer need to give other people your phone number for them to contact you. It is a step in the right direction, but it would be great for them to get rid of the phone number requirement all together.
Thunder and Voyager are my favorites on Android, but Mlem on iOS is my overall favorite.
Never. I have latex foam pillows that are a solid block, so there is nothing to fluff. It took me a while to get used to how firm they are, but I absolutely love them now.
Thanks for the update!
Not just any advertisement. An advertisement for something that is likely limiting their job opportunities that they have been studying years for.