Don't worry about all the questions, that's what this thread's all about and it distracts me from my work which is always a plus!
I actually think Ancient History is becoming less popular, which is a great shame, and if you're interested in doing it please don't take that as a sign you shouldn't! I work part time at my old college at enrolment, and the last year I was there and my old Ancient History tutor told me that they had to cancel it that year because only a few people had signed up, it was quite sad. I took it with modern History, but I definitely prefer the Ancient stuff and my dissertation is solely Ancient History (though, you can choose to do it solely modern or a mix). I think most people are so focused on employability, they forget that Ancient History is interesting and has the same skills. Plus, since some schools/colleges don't offer it as a subject, they worry that they won't be able to do it at uni level. A lot of History students I know who have to pick an Ancient course always worry at the start of the course, but they get used to it.
I doubt that they will be oversubscribed, mostly for the reasons just above. Plus, there are so many joint honours options, like Archaeology and Ancient History and that sort of thing, so Ancient History shouldn't be very competitive nor oversubscribed.
I actually went to Warwick uni for a year studying History, but dropped out. I personally found that uni wasn't for me, and they made it difficult to pick Ancient modules, and it was then I realised I wanted more Ancient History. I applied to Lancaster in the same year as applying for Warwick, but again, that was for History and if I remember they didn't actually offer Ancient History. I also applied to Kent, Plymouth, and Edinburgh. I got offers from all five for History, but chose Warwick because of the prestige, really.
I then applied only for Manchester after dropping out, because I saw the joint honours option. I wanted to do modern History as well, because I want to do a PGCE in History. Other unis don't offer the joint honours course, as far as I'm aware, but many do let you cross modules - so if you do History, you can do Ancient modules, or vice versa, which is equally a good choice. I took Ancient History and History simply because for some of the Ancient History compulsory modules, if Ancient History had a large amount of students that year and I'd only taken History, I wouldn't have the option of taking that Ancient compulsory module, if that makes sense?
My A Level results were A* (Sociology), A (History), A (Ancient History), but the requirements for Manchester for Ancient History and History are AAB.
Definitely, yeah. I won't lie to you, there are some that need pestering some, but most are really on the ball and great to get along with. Like with a lot of art subjects, a lot of the time your essays will have to cater somewhat to what the professor likes in essays - for example, some professors at uni like coin evidence A LOT, so in those essays, I always make sure to include several coins to support my points. There's a classics library, too, which students share with professors, so you can really get to know them there. Plus, as an Ancient History student, you get the option of joining archaeological digs in summer - I haven't done it because I'm quite lazy, but I heard that you make real bonds on those things with students as well as the professors who supervise.
One of the things I like about my choice is that, unlike other subjects, you get to decide your dissertation topic from scratch. It might sound daunting right now, but I was so glad I got to pick mine from something I found interesting. For other subjects, like History, you usually have to pick a module and come up with a question to do with that module, like if you're doing a module on Nazi Germany, you'd do a dissertation on that. With that system comes a great deal of competitiveness to do certain modules, and you can miss out. However, with Ancient History, they basically said that anything we've found interesting we can do it on, and they'd assign us a supervisor then. There are obviously some boundaries, but for the most part, you get a bit of free reign.