The enjoyment is a fact, not a conclusion. Also the word better has no place, or meaning here, because I enjoy life and those things I don't enjoy are irrelevant.
Nevertheless, you are making a choice because you value enjoyment. If this choice is to be based solely on reason, you must have a reason why enjoyment has value. Else, it's not a choice based solely on reason.
Now, you may wish to say, "just because it does." In which case, you have an unconditional value statement - which cannot be know by reason alone.
Therefore. your choices made based on this value are not choices made solely on reason.
So.. does enjoyment have value to you because..., or "just because."