Hi Hywel,
I'm a 6'1 E33 owner. I can stand comfortably in the aft cabin, saloon and galley. I can't in honesty remember about the heads. It's level with the galley but has a ceiling for the part under the 'windscreen'. This is where the throne is anyway, so I tend not to be standing in that location. I can stand in the forepeak if I'm under the hatch (even when it's closed). Hope this helps.
I'm the opposite to Peter: I definitely did want a deck saloon design. and IMHO think Moody got the E33 spot on as well ... I did buy one after all.
It's roomy enough to work as a live-aboard and the deck saloon ensures it doesn't feel claustrophobic. The heads is palatial for a 32'6 yacht. The compromise is storage: the forepeak is well-equipped with a hanging locker, shelved locker, drawers unit, 3 above berth lockers on each side and a wet locker beside the door into the heads (yes, it's en-suite) plus under-berth storage for sails, etc. The aft cabin has a small hanging locker and various nooks, crannies and those open cave shelves that probably have a proper name I don't know. It's fine for guest use or to transfer a week's worth of gear into.
The real issue is the saloon. There's no wall storage above the seating and a week's worth of provisions will quickly fill the majority of the under seating storage which is already limited by the fridge taking up about 1/6th of the space. Tools and spares take up another 1-2/6ths. The galley has enough space for all the cooking and eating gear and perhaps a few dried goods in the little shelves behind the oven and sink. There's no storage below the saloon sole, the water tanks and batteries eat it all. It can be made to work, but provisions are best put in in the reverse order to planned usage.
As an aside: the forepeak berth is plenty long enough but I have to sleep diagonally across the berth in the aft cabin (which since one side is about 4" shorter than the other isn't really suitable for a couple unless they're of rather uneven heights). This makes the aft cabin my normal location when going out with others - a couple share the forepeak, I go in the aft cabin and if I'm packing them in, another couple can easily sleep in the saloon. (Storing bedding becomes an issue at that point - I tend to dump bedding from the saloon in the aft cabin.)
The specs often state the E33 sleeps up to 5. I assume that's supposed to be 2 aft, 2 fore and one in the saloon, but the seating is easily wide enough for two, and could be a good 4-5" wider if you removed the backrest cushion, which also gives you an extra 4-5" of length. Depending on how friendly everyone is and what height they are, you could sleep 6.