Life of Pi has phenomenal animals. I knew the tiger had to be fake, but it was nonetheless gripping.
And while I prefer practical effects...it simply isn't, well, practical; not with the types of movies we have today. If you want something to be visually astonishing that's other worldly, you simply can't do that with practical effects.
Horror films, however, really need to stop with the CGI. They are the hardest movies to keep a participant in simply because of the genre. We want to be scared, but if it's genuinely scary we look for weak points in the film, anything to bring us back out. CGI is that weak point. That is why, to this day, nothing is scarier than a deranged killer whom you can't escape.