Wow. Just wow. Either you watched the wrong movies and formed an opion from a small sampling, or you're inhuman. I wouldn't be surprised if its the latter.
Be one of us.
Seriously though let me pull up a list of there work:
1 Castle in the Sky (Seen Most of (Own))
2 Grave of the Fireflies (Watched Twice. I think everyone should see this particular one. Very Depressing.)
3 My Neighbor Totoro (Seen a good amount of(Own))
4 Kiki's Delivery Service (I've seen this one(Own))
5 Only Yesterday (Haven't seen)
6 Porco Rosso (Haven't Seen)
7 Ocean Waves (Haven't Seen)
8 Pom Poko (Haven't Seen)
9 Whisper of the Heart (Haven't watched this one(Own))
10 Princess Mononoke (I want to say I have seen this one. I know at the least its been in the house.)
11 My Neighbors the Yamadas (Haven't Seen)
12 Spirited Away (I haven't watched this(Own))
13 The Cat Returns (I know I've seen part of this at the very least.)
14 Howl's Moving Castle (Seen)
15 Tales from Earthsea (Haven't Seen)
16 Ponyo (Seen. I enjoyed Ponyo but, yet again much like watching golf on TV. Pretty to watch and I can only get into it in a rudimentary way. (own))
I think I have a pretty good sampling.