I don't like to use the chorus effect on leads because to me it sounds to unrealistic for a lead vocal. Backgrounds and hooks are ok but I think the chorus effect does not replicate the timing and natural accent changes that you would get by just using two takes and doubling the vocals. Sounds like "T" for example seemed to become smeared a little when using the chorus effect, where when using two vocal tracks you can better control that sound on one layer. Just my two cent.
What do you suggest are good effects to use on lead vocals?
For lead vocals, heres something thats you might like. Record your verse 3 seperate times the same way so every word hits the same at the same time. If you got access to vocalign that reallly helps with this too. Pan two of the vocal takes hard left and hard right and leave one up with middle. Reduce the volume of the panned vocals until you get a nice mix and are happy with the sound. Record your dubs/punch ins the same way and add a bit of reverb to them and a bit of stereo delay. See what that does for ya.