Mechanical Engineering is often seen as the "broadest" of the engineering disciplines, which may be the best option if you are unsure. It covers things from many of the other courses and you can choose more specialised subjects in third and fourth year. To be honest, the first two years of engineering courses are often fairly similar, as they want you to have a decent background knowledge before going into specifics.
In Mech Eng you get to use the student workshop which is my favourite part- basically playing with lathes! I can't comment on the practical aspects of other courses but the Student workshop is for Mech Eng only.