I feel the need to comment on some of those, some of it is about taste of course.
If someone says H&D 2 is knee-cappingly hard then they haven't played H&D1.
That's actually pretty much the reason I never tried The Witcher either.
Heresy! I've never really missed a cursor and it would ruin the immersion, admittedly the game has it's own style but when they tried to make it more mass market compatible with part 3 it really lost a lot of it's charm, one could even say all of it, resulted in a big desaster and reputation hit etc. It's perfectly possible though that the german version has far superior voice overs and a lot of the charm could be lost in translation.
As for my personal list:
FarCry 2 - Was really looking forward to this one but it turned out unbelievably lame and shallow. I played it to the end just to see the outscome, which was even more lamerer than the game itself but I could have saved some money there.
Cossacks 2 - I know some here liked it but as a big fan of the first part and American Conquest I didn't like it at all, you have to micromanage every single formation, the AI steamrolled me in every skirmish attempt I made and combined with the performance problems it had at the time I just dropped it. Later learned it had Starforce so I won't ever pick it up again either.
If they won't patch ETW to improve the campaign AI and diplomacy it could make it onto this list as the TW game I spent the shortest amount of time with. Even though it's a pretty good game in many respects.
I've also suspended playing ArmA II, but I hope they will patch it to the point where it's worth picking up again so i wouldn't consider this a closed case yet.
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