The number of rooms in a hotel, resort, B&B or other establishment that provides serviced rooms for lodging (thus excluding holiday apartment rentals and other self-catering places) is sometimes overlooked factor when picking up properties.
After several earlier experiences travelling abroad, I realized I'm not really comfortable staying in very small properties with less than 12-15 rooms, if I have some larger alternative of equivalent comfort.
At least for me, very small hotels with just a handful of rooms, or B&Bs in general, just don't provide that minimum "privacy in large numbers" I get on bigger properties. You end up meeting the same guests all the time on breakfast, swimming pool or garden or patio. Breakfast buffets are often more restricted. Sometimes I found staff to be overly personal. I really dislike very small properties with just 2-4 rooms, where intimacy with fellow guests and staff becomes almost a matter of proper manners, it feels like I'm staying on a stranger's home and I don't like it at all.
On the other end of the spectrum, hotels with more than 150-200 rooms start to feel too massified, and service quality usually goes down if only because the places are too big. I stayed couple times on very large hotels (500+ rooms), didn't like the experience much. What I'll avoid even more are hotel complexes where I'd be staying in a "lesser" property that shares some services - other than just a parking lot - with other hotels, which almost always mean the lesser property is not properly cared for.
My ideal range are hotels on the 60-90 room range: big enough to have a professional atmosphere and professional staff on their roles, yet small enough to allow for attention to detail throughout the property.
What about your preferences?