I'm developing a sudden love for the Brause pumpkin. I don't understand how or why, but it's like it squares the ends for me ... I don't even have to think about it. It's magic.
My forever friend is the Leonardt Principal EF, and very close behind is the Gillott 303.
I also have some vintage Esterbrook 357 and 358s which I'm in the middle of a sneaky affair with. I just hope my Principals don't find out ...
And I keep a few Tachikawa Gs around for rough paper or less-perfect work. They're very reliable and unsnaggy, so I feel like I can use them even when the conditions aren't quite right - whereas the Principal and the 303 will complain and not work, like fussy princesses.