Re: Your favorite guitar cable?
For pedalboards, I really like the Bill Lawrence "Wilde" stuff. In the past few years that I've used them, I think I had one or two eventually go bad and have to be re-terminated (they have the screw down connections). The sound is clear with a more of an upper mid emphasis. I'm not sure I'd want an entire rig with them, but I think they mix well.
For longer cables, I've been using the Lava Cable "ELC Tweed" cables for some time. The ELCs are pretty clear sounding cables, with more definition in the lows than other cables I've used and the high end frequencies are still present, but not as pronounced as with other cables. I'd say it's a pretty balanced cable with a full frequency response. Mark (Lava Man) also makes the ELC in a pedalboard format, but for my taste I felt the high frequencies got rolled off a bit too much collectively (which is why I like mixing them with the Bill Lawrence stuff). Mark is a standup guy with GREAT customer service (he's made some custom cables for me before and they turned out excellent) and a really solid product. He also offers a wide variety of different sounding cable and could steer you in the right direction if you had any questions about what to get.
Planet Waves are good cables if you're all about the midrange. They don't have the lowend of the ELCs and because of their frequency response, they come off as more aggressive sounding cables. The clarity in the midrange and snarl make it great if you want to cut in the mix in a rock band, but the highs aren't as defined as other cables and if you want a thumping lowend you'll be disappointed. This one is somewhat of an exciting cable (atleast for me, being a British fan), but keep in mind that you can't easily undo the coloring that it imparts.
The Monster Cable "Rock" cable has more of a lower mid emphasis with some veiled highs. The one I have I pretty much reserve for my bass guitar in the studio. Not bad, but completely overrated.
I've had the Canare GS-6 before, but felt it was the dullest sounding out of the above cables. It's well made cable and an industry standard, but it's dark and pretty bland compared to the above.
As far as speaker cable goes, my favorite is by a small company called Mulder Audio. I can't afford their guitar and pedalboard cables, but the speaker cables are phenomenal and one of the best purchases I've ever made. The clarity and punch you get from them (coming from the typical speaker cable brands) is immediately noticeable.