I have to completely disagree with most on Yachtsman. It was terrible and oversalted and the sides were the same. We were a party of 4 adults who all ordered different cuts...none of us thought it was good and we all tasted each others just to make sure we weren't crazy. It all looked great, and was cooked the way we ordered...it was just awful. I also thought the atmosphere was lacking...not bad. Just not for me.
I feel the same about Le Cellier Steakhouse. Have eaten there several times and I found both the food and service to be uneven at best.
Have eaten steak at CG, V&A, and a few other signature places too that were all good to exceptional. I'm not a huge fan of California Grill...the food there is phenomenal and it would be a great place for a group meal/lounge/drinks place. But when my wife and I are having a special fancy night like my signature dining experiences to be more relaxing. I think everyone at CG gets so excited to watch the fireworks from the roof that it feels more like you are eating a super high end meal while waiting for the parade...
Aside from Victoria and Albert's where we were fortunate enough to have an experience of a lifetime on our Disneymoon, my hands down best place for beef filet and overall excellent experience is ARTIST POINT.
Consistently a wonderful cut, perfectly seasoned, melty medium rare delight. A perfect example of what a steak should be. They don't slather it in salt and butter. The steak is the focus of the meal. I think there is a house made steak sauce that comes with it but I have never needed to try it. The sides are usually some kind of potato and roasted root vegetable which they will substitute if you don't think you will like what the steak comes with...we usually go in fall so I can't comment on the seasonal changes and I also specify beef because they usually offer a Bison steak of some kind as well which I have never tried. I have never had anything less than a fantastic meal there and find that the atmosphere for the early seating to be intimate and a wonderful break from the constant input of the parks.