Although I have had favourite bass string sets ever since I started playing flats around 2000, I have never had a 'favourite' guitar string until recently. After trying various brands and gauges recently I have standardised on Fender 'super 250' .009–.042 on my (electric) guitars. This was based on feel as much as the sound. The super 250's come in a handy pack of three sets for £10.80 from amazon. The vintera mustang I bought recently has unknown strings on it which I think are 10s, so I'm looking forward to hearing how it will sound when I put on a set of the fender 9s.
It is interesting that to my ears the 9s sounded best in the video with the 10s and the 11s having a slightly more 'muffled' quality. I have tried 8s previously but for me the high E breaks far too often.