I've been using a kiwi cutter to scoop about 1/2 to 3/4 teaspoon of soap then paste it into the bottom of the bowl. It's a habit I got into as I wanted to keep my pucks clean so I could sample off them for family/friends. Consequently I've never developed any skill in 'loading' a brush and have come to prefer bowl lathering as I feel it gives more control. Also I find the soap tubs confining, I like plenty of space, hence my Robyn Bloom bowl (spaghetti bowl as you referred to it
) has become a favourite.
The down side is if you overload the bowl to start with then there is soap wastage but that's not an issue for me as I've got plenty (though probably not in the realms of
@SpeedyPC 's legendary soap stash).