I am a 3rd year student.
Tocil was my first choice when I was a fresher and I got it. Same reasons as you, I wanted to be near the gym, the academic buildings and also not right on top of the loud union.
I actually preferred the flats to halls. It's a nicer layout. I had a friend in Rootes, which is the most popular 'party' halls (corridors)...and I didn't really like it. Also, in Tocil, the bathrooms aren't too bad. There are normally 3 bathrooms and cleaners clean the communal areas, so it stays decent.
In Tocil's bigger flats, there are 6 guys and 6 girls in a flat, each on a seperate corridor, the flat is in a sort of L shape...boys down one side, girls down the other and theres a good sized kitchen in the middle, which is also used as a communal area.
Tocil is also on the side of campus that is closer to Tesco- means you have less distance to carry heavy shopping bags back, than if you were in rootes for example.
If you still need convincing.... I liked Tocil so much that I applied again for my final year (next year), but I ended up getting my 2nd choice instead (Hurst).
I'm just happy to be going back on campus though to be honest- wherever you end up staying, you'll have a great time! Freshers is amazing.