Hi, IGO/ beenthere (can't figure if you're the same person!) --welcome to the forums! Sounds like you're working on the common sense version of how credit ought to work, but that's not the real version.
For the optimum credit mix, you want to have 2 or 3 credit cards (CC's) that are mostly paid off, but with one reporting a balance of under 10% of its credit limit (CL), and some sort of open installment loan reporting. Now, I think it's crazy that you lose points by paying off your loan, but that's the way it works. However, you don't get nearly as many score points off of installment as you do off of revolving (CC), so the payoff shouldn't hurt too much.
When it comes to FICO scoring, you get rewarded for having a lot of available revolving credit, but using very little of it. This is interpreted as meaning that you qualify for a lot of credit, but you are self-disciplined enough to barely touch it.
The simplest way to work this is to take your credit card with the largest CL, take off the last zero, and charge less than that. So if you have a $1000 CL, take off a zero --> $100, and let around $40 - $90 report on your statement. Any others should be PIF'd --paid in full before the statement date, which is usually when the CCC's report to the credit bureaus. hope this helps!
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007