RPTR ERROR ADMITTED IN ATX FERRY FLT MAKING A WRONG RWY APCH LNDG.

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I AM SCHEDULED TO FLY FROM FRONT RANGE TO DEN AT AROUND XA00 LCL. I CALLED TWR ON THE GND AND RECEIVED A CLASS B CLRNC AND SQUAWK. I THEN DEPARTED FRONT RANGE AND IMMEDIATELY CONTACTED DEN TWR. THE CLRNC ON THE GND INSTRUCTED ME TO ENTER A L DOWNWIND TO RWY 17L AND I READ THAT BACK. ONCE IN THE AIR; TWR AGAIN INSTRUCTED ME TO ENTER A L DOWNWIND TO RWY 17L. AGAIN I READ IT BACK 'L DOWNWIND RWY 17L.' I WAS CLRED TO LAND RWY 17L AND I BELIEVE I SAID CLRED RWY 17L. I HAVE FERRIED THIS ACFT 7 TIMES FROM FRONT RANGE TO DEN AND WHENEVER I LANDED TO THE S I WAS GIVEN RWY 17R. MY MIND WAS SO SET TO LAND RWY 17R DUE TO HABIT THAT THE RWY 17L CLRNC DID NOT REGISTER IN MY MIND. TWR SAID 'WELL; YOU LANDED ON THE WRONG RWY; TAXI TO M5.' TWR TOLD ACFT BEHIND ME TO GAR. I ALREADY TOUCHED DOWN AND KNEW OF NO CORRECTIVE ACTION BUT TO TAXI TO M5 AS FAST AS POSSIBLE. I PERCEIVED RWY 17R WAS THE RWY I WAS CLRED TO LAND JUST OUT OF HABIT. I CAN NOT EXPLAIN HOW I COULD SAY SOMETHING WITHOUT HEARING MYSELF. FROM THE TIME I LIFTED OFF UNTIL TOUCHDOWN WAS 5 MINS. DURING THOSE 5 MINS I WAS LOOKING FOR TFC; LOOKING FOR THE ARPT; GOING THROUGH TKOF; CLB; DSCNT; AND BEFORE LNDG CHKLISTS. I WAS CONCENTRATING MORE ON AVIATING AND NAVING THEN COMMUNICATING. OFTEN TIMES AT NIGHT OR DURING POOR VISIBILITY I SET UP THE ILS FOR THE APPROPRIATE RWY. ON THIS FLT I DID NOT DO THAT. I BELIEVE IF I DID THAT I WOULD HAVE CAUGHT OR AT LEAST HAD A BETTER CHANCE OF DISCOVERING MY ERROR. A FACTOR AFFECTING MY PERFORMANCE DURING FLT WAS MY WORKLOAD IN 5 MINS. HOWEVER; THAT IS NOT AN EXCUSE BECAUSE I WAS GIVEN THE RWY TO EXPECT ON THE GND. ANOTHER POSSIBLE FACTOR WAS EMOTION AND STRESS. 2 DAYS EARLIER I LEARNED I HAD AN INTERVIEW WITH A COMMUTER. I INFORMED MY PRESENT EMPLOYER AND LEARNED THAT DAY I WOULD LOSE MY PRESENT JOB IF I TOOK THE INTERVIEW.