Does this sentence has comma splice keeping a journal is satisfying you prefer taping your thoughts to writing them down?

No, it is not a comma splice, but rather a run-on sentence, which is similar. Both comma splices and run-on sentences contain independent clauses that are not properly joined.

In this example, the two independent clauses are "keeping a journal is satisfying" and "you prefer taping your thoughts to writing them down."

In a comma splice, these clauses would be separated by a comma: "Keeping a journal is satisfying, you prefer taping your thoughts to writing them down."

In a run-on sentence, one independent clause follows another with no punctuation or Words separating them. An example is the sentence asked about.