well here my opinion:
Kuyt: Thinks he is still in Feyenoord. Back then he had to do all the hard work, back track, help the midfield and go back into the attack. He has great stamina and work ethics which make him a great asset to the team but IMO his problem is he tries to do more than he is supposed to.
Torres: I got nothing bad to say about him, he is the kind of striker we've been needing. He concentrates in scoring goals, gets into good positions, tries different things (bicycle kicks for instance) and is a genuine goal threat.
Voronin: I'm actually quite surprised with him. Has a good eye for goal, great possitional sense and can get defenses off guard which make him a real threat. Good piece of business by Rafa.
Crouch: I've stated several times, I like Crouch. He is different to any striker in the league (and Europe). Looks clumsy but has good control of the ball, complicates defenders with his size and is good holding up the ball and bringing others into play. He can also score some great goals as he proved last season. IMO the best partnership that could be formed in our current team would be Torres and him.
Babel: Calling him the next Henry might be a mistake. Don't get me wrong, I think he is a good player with great potential but I dont want to place the bar too high as many did with Sissoko. Now, comparing him with Cisse is another thing. Babel is BY FAR a much better player than Cisse and will get even better. Now compare both of them. Both are strikers with great pace, are right-handed, are/were played on the wing by the manager and have a powerful shot. Now the main difference between the two is the attitude. Babel prefers playing as a striker but if the manager plays him on the wing so be it, no complaints like sissy Cisse. In Ajax he played as a left striker on a 4-3-3 formation and now Benitez plays him on the left wing, which leads to the next point. HE PLAYS ON THE LEFT. Not only does he not complain about playing on the wing but he does not complain about playing on the wrong side of the field. In fact, playing on the left has tought him how to break into opposing area and set himself up for his stronger leg.
Another thing is he is only 20 years old. He is a young, versatile player who will only get better with time. If people want to compare him with Cisse then fine, we have just gotten another Cisse, only that this one has the right attitude and does not try to rely only on his speed and powerful shot.