Furthering the GBAchef agenda we have a discussion of biscuits, specifically your most liked and your most disliked. Anecdotes and things like "I like boxes of broken biscuits" (by the way if you are ever in the UK buy a box of them or the chocolate equivalent if you want the general UK biscuit experience) are very welcome.
We do also take the position that Jaffa Cakes are indeed cakes as the makers claim ( http://www.jaffa-cakes.com/jaffa-cakes-biscuits-name for a somewhat interesting legal case on the matter) and thus are also excluded from this. It physically pains us but we might also have to exclude godliness that is Tunnocks from this. Depending upon the final ruling of the GBAchef council this may see my membership being revoked for going there.
Marshmallow driven biscuits are a tough call -- standard pink and whites count (though I can not see them taking top or bottom place) but Jam Mallows less so.
Finally if it was not already obvious we are using the English definition of biscuit and as such American style cookies are excluded, there are some fine ones (I recently had some very nice bunch of oatmeal and white chocolate ones made by a visiting USian relative) but that is not what this is about.
Best.... seen as I removed tunnocks I have a few options.
Ginger crinkle crunch -- I really like normal ginger biscuits but tried these on a whim one day and it turns out small chunks of dried ginger in your biscuit is an awesome thing.
Hob nobs. With there always being a danger of eating two packs in a single sitting it means they have to be on there. Chocolate or not means nothing here.
Malted milk. Second only to chocolate cake in the list of things I like to soak in milk and then eat. I can take or leave chocolate covered/sided ones though primarily as they interfere with soaking up milk and the chocolate is too thin to lend enough structural support to them if you allow them a long enough soak to become saturated*.
*the advanced technique of chocolate side outwards to create a cantilever* beam** but have the newly soft biscuit exist within the low/zero displacement zone or the cretin class of "use a spoon" are not enough to dismiss this fault.
*treating instead as a singly fixed point item with self weight providing the tensile force just ends up with milk everywhere. The chocolate usually does OK here as well but the turning makes it a cantilever beam thus this part of the physics can be ignored.
**why yes I consider the physics of biscuit eating at this level. If this concerns/offends/perplexes you be advised to never take me to an all you can eat restaurant.
Worst
Party rings.... I hate them and always have; I find the taste, consistency and feel on your fingers to be horrible. Sadly most parties (birthday, general, new year's eve) I ever went to featured them and as such are what I will blame for my general apathy concerning parties to this day. That they also do not dunk well in milk is just fuel to the fire.
Rich tea. I do not hate them, I just do not see why they still make them/place them in such a vaunted position.
Middle of the road
Arrowroot biscuits. Invariably something I get to bring across in my luggage and have to explain to US customs but though they are perfectly edible I am not sure what the big deal is.
Pink wafers. Only mentioned as I tried several in the US and they were less than stellar where the European versions seem to be quite nice. I fear this may be similar to arrowroot biscuits above though.