Or maybe a bit of both, but where you start (pleasing God before people or people before God) is important. When it comes right down to it, if you will bow to the expectations of other people instead of doing what you know will please God, that's really bad. It's not a good sign for you and it is doubtful that you are really a Christian.
It's good to want to please people, to serve them, to help them. But what if they want you to do something bad? Fit into the crowd, go along with the church leaders on pressure tactics for tithing strategy, buy some alcohol for underage drinkers, share that juicy piece of gossip, watch that dodgy TV show... These things are not pleasing to God and you are compromising your witness to unbelievers by associating with them.
If you start your day praying something like the words below, you will have God behind you and you will be reminded of your number one priority for the day: Glorify your Saviour and Maker. But remember that the fallen human is tricky too. Check your motives because you might just try to get people against you so that a different group of people will see you being "persecuted" for the faith. This is a different side of people pleasing which is just as evil. Your motivation for any people pleasing should be love, and in this you will be pleasing God (if you love Him first).
"Lord, help me to keep my mind on you and your will. Help me to please you this day by walking in your ways. May my walk be a witness to your Glory and may I catch myself if I act to please people in a way that compromises my main purpose of sharing your glory. Help me to believe that this is important and not just pray it so that I can say I prayed it. Amen"