I feel the same when driving mine, it doesn't feel me with confidence plus there is a lot of money tied up I do not want to crash!! I would like to get it on an air field and go mad with it just to see how far is too far with little risk. There has been times when I have been surprised on what it can do. But it is so un-eventful - it is quiet, smooth and calm, as when I was in my old Ph1 I thought I was doing a million miles an hour when in reality it was 70. But now if I want a bit of a special drive I get in my E34, but that is a different matter!
Although what I think they do brilliantly is that it eats the miles up, it is a very good GT car, especially as mine is an auto (gutted as I missed out on ording a manual by weeks). I could drive it all day and not get bored of it. It is ok on fuel for the commute (I am getting about 27-30mpg on the 20mile round trip in traffic) but as soon as you do a long run it is very good for what it is.
What I also like about it is that it is subtle and looks like any other 1 series. Although another down side is that you get moron children trying to race you in their Corsas and Fiestas.
The only thing I don't like in mine are the seats. They are comfy and nothing really wrong with them, but I think it could have done with something like what the M2 has, like the single piece/bucket style seat. The new M135i has this and probably the only improvement the new one has.