Question:
Are there going to be different levels of enjoyment in heaven depending on our service? What’s our motivation for wanting to do things for the Lord? We’re saved and going to heaven no matter what.

Answer:
We will receive rewards according to our works (1 Corinthians 3:13-15) when the Lord comes (Revelation 22:12). But any reward or crown we receive, we will cast at Christ’s feet (Revelation 4:10, 11), for He gives us the strength to serve Him now, and so He alone is worthy to receive the rewards.

Rewards have their effect in the coming kingdom when Christ will reign over this earth (Matthew 25:21). A “crown of righteousness” will be given to everyone who looks forward to the day when Christ will reign over this earth and who “love His appearing” (2 Timothy 4:8).
However, in the Lord’s presence in heaven there is “fullness of joy” (Psalm 16:11). There is only one degree of happiness there. Our minds can’t comprehend now what it will really be like in heaven. For one thing, in heaven we will want to enjoy Christ as completely as we can. Should we not want to enjoy Him as completely as we can now as well? The motivation we have for living for Christ now is a sense of His great love for us. This “constrains us” to not live unto ourselves but unto Him who loved us and gave Himself for us (2 Corinthians 5:14, 15).