Interesting point about Smith. Being the captain, he tries to set an example for the rest of the team, which is why he is a positive player. If you remember, he said he was 'angry' about the defeat in the NatWest ODI's, so he tried hard to undo that damage. It worked in the first 2 Tests, where he got a lot of runs. But this 'anger' may have got the better of him in the matches that followed, as he struggled to get past 20.
If Trescothick can play more positively, he can produce more big innings as in the Oval, which has to be one of the best innings by an opener. You see a lot of potential out there. Sure, there was a droppecd catch or two, but this is a double century, not 24-25 runs. His footwork has a problem, but then, that might be his style of batting, unlike, say, Nick Knight, who steps out quite often. When I had seen him in India, he did bat quite well, except in the final Test, and he carried on the good form in the ODI's. It's only in the Ashes that he had problems with he moving ball, but he can improve. When he gets in, he stays in. Better than some experienced players who struggle for 20/30 runs, then throw it all away.