light, one of my favorite effects on vocals is to double it, using the original vocal with the same vocal sampled and dropped down an octive. I usually lower the volume on the dropped octive sample quite a bit, sometimes up to 50% but usually around 25%. I also like to add some delay to certain samples. If I emphasize a sylabel it's only because the rapper/artist wants it done that way. Personally I think that technique is played out. I don't do alot of panning because most of the people listening to it don't have the type of gear it would take to truely appreciate it but I will pan to create a vocal stereo effect rarely.
holla,--dac