A little update.
1) Gillette Silver Blues are my favorite blade. They're almost as sharp as Feathers and Astras, but they're smoother right from the start than both of those.
2) This is going to be old news for some, but I've learned something new about blades in the past couple months. I used to use a blade 4-5 times and be done with it. When the sharpness gets noticeably different. After watching Michael Freedberg for so long, he finally convinced me to keep using the blades beyond that. By the way, Freedberg, for my money, is far and away the best shaving reviewer on youtube. Back to his videos...he often talks about being on a blade's 8th, 12th, 15th, and sometimes more shave. For the longest time, I just ignored that little ditty. Assumed he had such a different beard, or had very different expectations for shave, so his insane number of shaves from a single blade didn't apply to me. One day, by his subliminal urging, I kept using the blade. 5th, 6th, 7th, 8th shave. I'm done in that 7-8 range. At that point, I have to keep going over a spot to get all the hair. It's not worth the extra time, but I'm sure the blade could still provide a nice shave beyond that 8th shave.
But here's the fun and surprising part of this experiment: around that 5th or 6th shave, as I said, I do notice the blade not being as sharp, but I also notice that blade is providing a much smoother shave. I'm getting anywhere from 2-4 more shaves (usually 4 more shaves), and they're also more comfortable shaves. I might get a weeper or two on the first 1-4 shaves, but I get zero weepers on the 5-8 shaves. So, two different feels there. 1-4 = sharp against the skin. 5-8+ = smooth against the skin.
I have no good excuse as to why I didn't learn this years ago. I guess at $.10/blade, I was never curious enough to find out how a blade performed after that sharpest stage of its life. From $.025/shave to $.0125/shave.