I also agree. I like the first forceful stroke that causes my wife to catch her breath and let out a short moan. Makes me say, "Oh. You like that hard cock, huh?". Hearing her trying to say "Yes" before I plunge in again is almost orgasm inducing.
Some of my own files with Suzie contain a lot of this. She told me that she loves the initial penetration to be really firm, violent almost. This often makes her shriek, which in itself almost takes me to the edge. Very occasionally I ease it into her gently, so she never quite knows what is coming (so to speak), so whenever I make the first thrust really hard it comes almost as a surprise for her.