I started with Astra SP then Crystal, Personna Red, Personna Labs, Personna Med Prep, Gillette Silver Blue, Gillette 7 O'Clock Black, Polsilver Super Iridium and then Feather. Plus lots of samplers, blade trades and blade PIF's along the way. I've tried a lot and have now narrowed my favorites down to: Gillette 7 O'Clock yellow Feather Polsilver Super Iridium Gillette 7 O'Clock Black Gillette Silver Blue Astra SP
They're ridiculously cheap too. I could only get about 2 shaves out of each one (Head and face) but at $9/100 blades...who cares? lol. Make sure you also remove them from your razors as they're uncoated carbon steel so they'll rust overnight unless you dry them off after shaving or drop it in a tub of alcohol.