Are you INSANE?! "Sounds better?" When I hear someone say that incorrectly, it "sounds" retarded, not "better." It truly does reflect poorly on their intellectual capacity. Many others will think you sound stupid when you replace than with then. Stop being stubborn and commit to changing because you are only digging your hole deeper.
Now, I suggest you re-read everything Ichinisan said because he is my twin brother and I happen to know for a fact that he does not agree with you on this. I'm getting a lot more laughs from you than the funny pics, articles, and videos, but it makes me sad for this generation. I mean, I've seen many then/than idiots, but none who actually thought "than" wasn't a modern word in DAILY use and none who thought that then was OK in place of than because it "sounds better."
Edit: Yup. You don't seem to know that prefering to be pissed off than pissed on is a comparison and not a sequence and, thus, should be than and not then. We are dealing with two completely different words meaning two completely different things for two completely different situations which should then be nearly impossible to confuse regardless of similarity.