Charles Morris is a bit odd, basically everyone who got put in there this year has been moved out now cos there is renovation work going on. I'm not sure if it will be ready for when you starat uni though.
Personally I like Lyddon a lot, it's pretty old inside though but the rooms are very big and the bathrooms are meant to be good as well - the girl I know who lives there said she's never had trouble with waiting for the shower or toilet or anything. She also has a washbasin in her room and A LOT of storage space. Ellerslie I've heard is nicer than Lyddon but I've not seen it myself but it's meant to be amazing. Oh and ith Lyddon you should bear in mind that you might not get in the building but instead in one of the annexes which is basicall a large terraced house, I don't think it's as nice as the hall part. And all on-campus are really oversubscribed, it's likely that if you don't get a place in one you will just automatically be put in Boddington cos that happened to a few people I know, so just make sure you state on the application form somewhere where it might ask "other preferences" or whatever, NOT boddington.