Life is full of things that, technically speaking, we are able to do, but that reasonable, considerate people refrain from doing—because it negatively impacts the other people around us.
Only assholes recline their seats – When stuck in economy, and craving for a little more space, remember everyone else is stuck in economy too. Treat your fellow man with respect—don’t recline your seat.
Travelling is supposed to make you explore and challenge yourself, but it does not make your better than anyone else. It does not give you the right to look down upon the things you loved before you went travelling.
Put your small carry on purse on someone else’s overhead bin. Let them worry about theirs. You need every inch of that leg room in front of your seat.