Hey man,
1st line support can be a great position - it's the first step on a rather illustrious IT ladder. I find that most the time my clients don't shout at me - they are actually really quite respectful of what I do and are always thankful for the support I give them. saying that - I work internally for an office and have no real contact with the general public.
I say enjoy the position, try your hardest and at every opportunity learn a new skill and take on more responsibility. I started my job doing first line support, now I do 1st, 2nd and 3rd and I'mnow really getting to grips with business intelligence (mainly SQL and MS Visual Studio reports), which has some big money behind it.
Other than that, congratulations on doing so well at interview! Good luck mate!