Hey,
I wouldn't nesisarely, always worie about the composers intention. Instead try and interpret it in your own way. Listen to other people playing it and try and feal the expression. It might be good in your situation to almost exagerate the the dynamics.
Also (and I seem to be saying this to every one these days) try inprovising and exploring themes and ideas.
when I was dooing my GCSE's I was given a composition exercise where I was given the first bar of a piece like Bach little prelude and I had to develop it (it helps if it's a piece you don't know).
Any way, try and enjoy it.
Sharma
I would say the composers' intentions are very important, especially for someone who wants to further their education and teach at some point.
Studying and paying close attention to what the composer indicates - phrasing, dynamics, articulation, etc. - will make any piece of music more musical, and within the context of the composers' intententions there is still room to be expressive.
Melia,
There could be a number of reasons why you think your playing is mechanical. It could be that you are not feeling an underlying pulse or rhythm in what you are playing. Believe it or not, counting out loud helps with this, as does taking care that you know what the undelying rhythm is. For example, are you thinking 4/4 when you should be thinking 2/2, or are you thinking 3/4, when you should be thinking one beat per measure?
Also, since you took time off, your technique is probably not the same as it was when you left off. If that is the case, you may be worried about playing the correct notes more than how to play the notes, which creates some tension, and inhibits your expression.
Anyway, those are two possibilities.