It is not an "obsession", and it is not really about "grip to blade length" ratio.
It is just about that a longer blade / edge generally is more versatile and a better performer than a shorter one in most cases (for me actually always) - discussed for example in this recent thread, even the designer of many Spydercos (by the name of Sal Glesser
![wink ;)](./images/smilies/winking-face.png)
Now if I have a great, comfortable, but still compact handle that I really like: Naturally I want it to have a long blade too, just so the knife gets more versatile. It is actually what fixed blades do: Long FIXED blade blades don´t have really long handles most of the time (TOO long handles can even get in the way a bit when sticking out at the back of your hand)
So, in summary: A compact, nice to carry, but perfectly ergonomic handle makes imho for a better (or at least more versatile) knife if combined with a long blade (Stretch 1 being a good example).
My perfect folder actually is technically not possible, cause it would combine a police- ish blade with a Stretch handle: Does not work with a pocket knife
![wink ;)](./images/smilies/winking-face.png)