I'm no expert, but here I go...
In order of current drivers champ standings (as of Hungary 2011):
Vettel: Possibly has the best outright speed on the grid and the master of the qualifying lap. Starts from pole are always a procession thanks to his terrific race pace and the terrific RB7. But when he finds himself further down the grid, he is prone to mistakes.
-Season high: Near absolute dominance for much of the first half of the season.
-Season low: His race in Germany was lackluster, and it marks the possible turning point in the season as his rivals start to make up lost ground.
Webber: Very consistent pace in races, resulting in some commanding drives throughout his career. But if the car is not to his liking, his pace suffers. And more often than not it seems, he makes piss-poor starts, often being jumped by up to five or six cars. Also, reliability has occasionally plagued him (his super-fans will tell you that his team sabotaged his car to favor Vettel
)
-Season high: Great drive in Germany, often challenging for the lead.
-Season low: Still couldn't get past fifth place in his home race of Melbourne. And ignoring a direct order from team boss Christian Horner.
Hamilton: Fantastic driver, with the race pace to match. He beat out Vettel in China back when the RB7 was still untouchable. He can be a very aggressive driver and great overtaker when it counts. But sometimes he can be too aggressive, often attempting foolish overtakes that end in calamity. He can also be a bit of a bonehead with the press when a race doesn't go his way.
-Season high: Superb drives in China and Germany to claim a thoroughly fought victory.
-Season low: Terrible race in Monaco witch saw him takeout both Felipe Massa and Pastor Maldonado. And another terrible race in Canada which resulted in a DNF as he spun Webber and then nearly ended Button's race.
Alonso: Possibly the best all around driver in the paddock. A very valuable asset to the Scuderia. He has great pace even when his car isn't the best, and even greater pace when it is. But he can have a very fiery temper when things aren't to his liking, which has lead to controversial moves. He also isn't much into being a team player, often making "number two drivers" out of his team-mates.
-Season high: Great drive in Monaco, which would have likely been a victory had the race not been red-flagged. And a deserving victory at Silverstone.
-Season low: A DNF in Canada following a collision with Button. Though this really wasn't his fault.
Button: Another all around great driver. Very smooth but quick driver, earning him the fitting comparison to the great Alain Prost. He has also made some terrific strategy calls. And some of his greatest races have been the result of fighting from the back of the grid. But don't expect much when he doesn't have a good car. And he occasionally will have a pretty lousy qualifying run.
-Season high: Despite coming from the very back of the grid in Canada... twice, he still had a brilliant race to take the win from Vettel in the final corners of the race.
-Season low: Back to back DNF's in Britain and Germany have severely damaged his title hopes this year.
Massa: Good driver with good pace, often finishing near the front like clock work. He was even the 2008 world champion for about 30 seconds, until Lewis Hamilton crossed the line to rightly claim that title. But since the season ending accident in Hungary in '09, his race craft has been lacking, being consistently outpaced by his team mate Alonso, and being demoted to number two driver within the Scuderia.
-Season high: Rightly out qualifying Alonso in the Hungarian GP.
-Season low: Tussle with Hamilton saw Massa bin his car into the wall in the Tunnel at Monaco.
Rosberg: A good asset to any team that he is at. He often will out race and out pace his team-mate from race to race. But he hasn't really had a good enough car to show his true potential.
-Season high: Another season full of Rosberg upstaging the great Michael Schumacher. And consistently in the mid points.
-Season low: None of his drives this year have really stood out.
Heidfeld: Last minute stand-in for the injured Robert Kubica. And proved to be a great move by the Renault team with a podium in Malaysia. But since then, he's fallen off in terms of performance along with the Renault team, and he's even in risk of losing his seat.
-Season high: His podium in Malaysia.
-Season low: Poor performance in recent races have put him in risk of losing his seat to the GP2 driver Romain Grosjean.
Petrov: Like his teammate Nick Heidfeld, Vitaly Petrov showed a lot of promise in the beginning of the season, with the young Russian scoring a podium in the opening round in Australia. But also like his teammate, he has dropped off in performance along with the Renault team.
-Season high: Podium in Australia.
-Season low: Performance in recent races has left much to be desired. And a scary crash in Monaco that forced a red flag.
Schumacher: One of the all time, if not the all time greatest driver in Formula One, and certainly the winningest driver in the history of the sport. And despite his age, he has had some great tussles with the top drivers this year. But his age is still apparent. Michael is just a shadow of his former self.
-Season high: Fantastic race in Canada, which nearly got him his first podium since returning to Formula One.
-Season low: Very inconsistent this year, often barely getting in the points and retiring three times. Not to mention a collision with Petrov in Valencia which lead to a measly finish of 17th.
I'll write out something for 11th-24th later.