I personally like Ulead - VERY easy to use
Played with Sony Vegas a bit, but probably has way more features, didn't have the time to continue playing with it - but will cuz I'm sure it will teach me new things.
Still use TMPGenc for color correction cuz I find it easier hehehee h
There are also another 10-15 other programs on my computer for video editing - I guess it depends on my mood
So to make this less confusing - if you want simplicity with a good amount of funtion - Ulead
If you want a lot more bells and whistles and have the time to learn it Vegas or Premiere