Best type of boundaries?

Well i have been working on a game in flash (first one) and i just learned clipping…err colision detection as its most commonly refered to as on this forum.

but i wanted to ask what way do you think is best for clipping?
using Tiles or just movie clips ect…

Personally, I despise Tiles ( let alone tile based games ) I think Movie clips are the way to go, thats just my opinion.