I really like the way the t looks in the DIN Monospace, and I think I prefer their f character as well. I like that it doesn't have the stem (for lack of proper name) at the bottom, which makes it blend with the other curvy letters well. The f character in the Ubuntu mono font looks great, but perhaps it looks a bit more like a courier letter than an Ubunto (proportional) letter.
I really like the way the t looks in the DIN Monospace, and I think I prefer their f character as well. I like that it doesn't have the stem (for lack of proper name) at the bottom, which makes it blend with the other curvy letters well. The f character in the Ubuntu mono font looks great, but perhaps it looks a bit more like a courier letter than an Ubunto (proportional) letter.