I have some expensive cables with brand names on them.
I have some very inexpensive cables by Blue Jeans Cable and Mono Price Cables.
They all work equally well (function).
The BJC and MPC cables are vastly less expensive (approximately 10% of the cost for brand name cables).
The bang for the buck is HEAVILY in favor of BJC and MPC.
The above results are for cables that are 10 feet in length and less, typical of what a homeowner will encounter when putting a system together. I have no experience with longer cables but for really long runs there are ways to maintain signal integrity.
What I want is a DIY HDMI cable system so I can tailor cable lengths to my system. Give me THAT and you have some hope of getting the big bucks from me for a cable. If I could custom size the cables for my systems, it would result in a MUCH cleaner install that is easier to do in the first place and easier to debug if (when) something goes wrong.
The other thing I want is a locking feature for HDMI connectors. Some progress has been made in this regard but it is still not a standard feature (or should I say a feature in the standard, HDMI standard that is).