We have paste ctrl+v, continuous paste ctrl+p, both with the option of toggling into mix modes.
Why not an insert-paste ctrl+i ?
Often I want to perform an action similar to continuous paste, but I may not want to perform it down the entire column, or I may want it to push down the pattern data below.
Alternately, a variation of continuous paste where you can control how many times it pastes with multiple presses rather than destroying the whole column.