Thanks for the link mate!
Also, I can't put my finger on it. It's something that lived with me since I began playing with SNES emulators, around 1998. I started out with ZSNES and I like the interface, and how it all works. Later I tried out Snes9x because all my friends thought filters were super cool (I think it looks like shit), but I never liked the interface for some weird reason, the image always got stretched in a weird way when trying to get it full screen, and it was slow on my old computer I had at the time. And that feeling stuck with me. It doesn't feel good to use it.
It's just simple as that. It has nothing to do with the accuracy of the emulation or anything, just... a feeling. I really feel uneasy using it.
Oh well, this got quite off topic I guess I'll see if I can get higan to work.
(I also tried to get RetroArch to work, which it didn't... trying to have an all-in-one solution. There's just something with setting up emulators and me that doesn't work. I never got N64 or PSX, PSP and PS2 to work (well) either (except on my phone, works flawlessly)).
/speeded ramblings
You have to change the full screen resolution in SNES9x's configs.