Depending on the actual aircraft there will most likely be drop down screens however these will only be used for the safety video as Monarch Scheduled services no longer offer inflight entertainment on flights scheduled for less than 3 or 4 hours.
As for the seat preference this is just a matter of personal opinion as all the seats are the same at around 28-29″ on the A320 and their other shorthaul aircraft fleet however if you want more legroom as you probably know these can be booked from around £15 and sit towards the front of the aircraft.
Their inflight meals could be a little larger for what you pay however they are really tasty. Depending on the time of your flight you can get a full English from £5 or a choice of two different main courses from £6 on afternoon flights.
Hope this helps, have a good flight! 😀