Well, my biggest complaints, in order, are:
<UL TYPE=SQUARE>
<LI>Visibility, mainly rear and A-pillar.
<LI>Non-flat cargo bay.
<LI>No rear seat ventilation.
<LI>Rear turn signals are red instead of amber.
<LI>Lack of power.
<LI>Fake exterior ornaments (hood vent and tire inflation).
<LI>No integrated hands-free bluetooth system for cell phones.
<LI>No decent on/off road nav system.
<LI>Fuel door doesn't lock/unlock with the other doors.[/list]
However, I think most of these can be remedied somewhat:
<UL TYPE=SQUARE>
<LI>A rear-view mirror LCD with camera looks like a good way to fix the rear visibility. As for the thick A-pillars and large mirrors, I guess I just need to learn to crane my neck more often.
<LI>I think the cargo bay can be made flat if necessary by adding some filler (i.e. foam or wood) to the back part.
<LI>I guess rear seaters will just have to roll down the window.
<LI>Rear tail lights can be replaced with these
lights.
<LI>A supercharger or turbo should fix the power issue.
<LI>Wheels can be switched out, and the vent panel can be switched out (but not sure with what yet, maybe some kind of ram air??).
<LI>I'll just use a bluetooth headset for the phone. Maybe it's better that all the passengers aren't involved in the call anyway.
<LI>Nav is coming, but not sure how good it will be. If not, the nav on my Treo is pretty good.
<LI>Can get a locking fuel cap. Just have to use a key, which is still an annoyance, but a minor one.[/list]
And, of course the things I like about the H3 greatly outweigh these!