Personally, I always recommend Slimming World. It works fantastically for me and plenty of other people I know, but obviously it's down to personal choice.
Slimming world allows me to eat plenty of fruit, veg, meat, rice, pasta, potatoes, and still enjoy treats like alcohol and chocolate when I want them. And I don't feel restricted when I go out for a meal or drinks at the weekend.
Have a look around the website and see what plans take your fancy and do a bit of research on them and see which one suits you best. You may be someone who prefers something like Juice Plus, or Slimming World, or clean eating.
Good luck with which ever you choose