I agree with Thanee, and somewhat with Zappo. The house rules shouldn't be too extensive or complex, and they should have a good reason for existing.
I would be very turned off by someone who had a large volume of printed house rules. At that point you might as well call it a homebrew.
My biggest peeve regarding house rules is when they differ from GM to GM. That may sound like a silly complaint, but I play with the same group of people every week, and almost everyone in the group GMs some of the time. Most of them use the same house rules from one campaign to another, but we have one GM - a very good GM, mind you - who loves other peoples' house rules but generally runs his game RAW. I find that really frustrating. :\