I thought the Silver Surfer looked a bit half-finished in the trailer, but I thought that Fantastic Four was okay as superhero movies went. It tried something different with the formulaic format of superhero movies, which can be summed up thus: character X gets powers, suffers tragedy that drives them to seek justice, gets framed for a crime and is pursued by police - with only minor variations, this has been pretty much the entirety of every superhero movie ever made in the western hemisphere. FF had some characters suffer a tragedy, see the bright side of it, and then become media darlings by helping people out.
After the cliche of tragedy as entertainment that most other superhero movies do by the numbers, it was nice to see something that was meant to be fun and throwaway - and the use of a bodysuit instead of cgi for the Thing must surely merit some sort of humanitarian award.
/subjective opinion
However good, cgi is at the stage of it's development where it's still too obviously an effect (the Silver Surfer is a good example), and it lacks warmth and character in the way that stop-motion doesn't. Bad stop-motion can be laughed at, while bad cgi just looks cheap.
/opinion off
FF2 looks like it might be good fun, though I think Galactus' appearance might just be as a cameo at the end of the film as a cliffhanger for the third installment. Still going to see this, though.