What a deep topic and awesome topic, according to Bro Eli he said tha what we do pleases God but what pleases God the most is Jesus Christ, the beloved son of God according to Matthew 17 vs 5.
Being obedient to God pleases Him, walking according to His principles pleases Him too, being a blessing to others pleases God too. There are couple of things we do that pleases Him or make Him happy. The mind of God should come first in anything we do that why He made man to please Him and bring Glory to His name.
Our christainity should be based on making him or pleasing Him, When God is all that matters to you. You will see reasons to know Him the more ad begin to do things that will make Him happy the more and the more you make him happy there His blessings on your life expands.