The first 3 Disney cruises I had been on were with my family : younger sister, myself and my mom and dad... we always (without requesting) had a table with no table mates.
Last year, my husband and I went by ourselves and had purposefully linked up our reservation with two other families we "met" on our sailing through Facebook and so we had a table for 10. including us (mid 20's) and a family with a mom and dad and 2 kids, and a family consisting of an aunt and her sister and their niece and nephew. We had a blast!
This year we wanted to try for something different... we requested a table for two, and with it being Jersey week we knew the ship was pretty full... we were granted our request and the tables next to us on each side were tables for 2 as well... we were all actually seated at a table that could technically seat 4, but only 2 people were at each table.
It was REALLY nice. Hubby and I like to eat fast to get on with all the night time activities and have time to go to our room and change... our wait staff realized that on night one and one night we were seated, ate all courses including desert and were leaving the dining room in under 45 minutes!! It was perfect for us!! We had our dessert as the large table next to us was just getting their appetizers
Now don't get me wrong, we had the BEST table mates last year, and I think that actually played into why we requested our table for 2... we were afraid that our table mates wouldn't be AS awesome as before. lol
Keep in mind, if you do have table mates, your wait staff will generally try to wait until everyone is seated before they take orders. So if you have people that like to show up late then it could hold you up a little bit.
I was kind of sad this year because I really wanted to be able to interact with Crush at animators and i thought since we were a table for 2 then crush wouldn't talk to us... WRONG I WAS!!! We were seated directly in front of the screens and crush talked to me 3 different times and all together, for about 8-10 minutes!!! It was amazing!!