For one to succinctly state in 200 words or less may be difficult. I will give it a go, however.
I am a Christian because I want to go to heaven. When I obeyed the Gospel, it was for this reason, and it is still the reason. Along with reason, there are contributing reasons. 1) There is meaning in life that transcends material life, 2) There is an objective/transcendent standard of right and wrong that can’t be found in any philosophy of this world, 3) There is One who has an interest (love) in me that is greater than any who live in this world, 4) Coupled with #3, my baggage is great, but the Lord’s forgiving capability is greater than any capability I have to foul it up!
I am a Christian because I love the Lord, as He first loved me.