I still just end up using bounce flash.
Yeah, same here.
I used to handle *thousands* of professional weddings years ago, and have seen the results of every contraption on the market. The problem we're trying to solve with on camera flash is easy to explain, but tougher to resolve. Marketing has made it more confusing.
The most direct, consistent and effective means of getting decent, on camera flash is to get the flash head about 2-feet above the lens. This in itself will produce the best pictures...better than any other on camera technique. Having a bare flash tube elevated a couple of feet above the lens will produce better on camera portraits than any other gizmo here that's not mounted as high.
Bounce flash is a close second......actually better if you have white, low ceilings to work with and in that respect we agree. The only problem is outdoors or when dealing with very high ceilings.
Lightdomes are frankly stupid because they require surrounding surfaces to work. As a wedding photog I don't have time to worry about the color and distance to nearby walls and ceilings because my 'milk-jug-on-a-flash' might not work otherwise. If it's a large room, or outdoors, or high ceilings then a lightdome does nothing but eat light.
Omni-bounce, lumiquest and bounce cards are pretty much the same beast. They work good in respect that they move the flash point higher up and increase the size of the flash spot. Problem is they don't move the flash point up high enough. I'd like to see one of these that uses a much higher head point elevatign the flash source 20"above the lens with some kind of light-pipe tube surrounding the flash. That would be ideal in my book.
Side saddle flash like the classic Metz units are the most horriod device flash devices every made. The flash from the side produces nasty nose and eye shadows, and looks terrible.
So, how about flipping orientations? *Sigh*.....I know we have brackets that can do this, but years ago I gave up and just mounted my camera vertically and kept it that way for most of the wedding. I rarely go horizontal anyways unless it's a group shot. This is where 6x6 film shooters had it best because they didn't need to flip their camera - just crop the resulting image accordingly.