One of the most important things to get right when you purchase equipment is to make sure your rod and line are balanced. Get this right and your well on the way to casting sweetly. Quite a few students have come to me with the inappropriate equipment or an unbalanced outfit.
Beware of that bargain setup from a none specialist fly fishing outfitter or a mail order company, chances are if costs less than £ 99 its going to be bad news. If its not balanced then no experienced fly caster will be able to cast with it. "You canna beat the laws of physics captain." Make sure you try before you buy, if the tackle shop wont let you do this then the odds are, they don't know what they are talking about! Fly rods can be a very personal thing so try one or two.
If you have the right tool for the right job then its going to get easy for you. And just like car spanners I have a sack of them one for each situation and one or two for no special reason other than I like the action. Overtime you will think nothing of having more than one rod.
For beginners I recommend a middle tip action rod. These rods are a little forgiving in that your casting stroke doesn't have to be spot on. A fast tip requires a little more precision in your technique. I have banded together 3 types of rod outfit for different fishing situations.
A note on rod length, it is reckoned that the most efficient rod lenght is 9ft 3 inches. Personally I find a 9ft rod most comfortable for casting and less tiring than a 10ft rod. Less leverage and a lighter rod. Longer rods tend to be advantageous for roll casting or fishing the "hang" in a boat. Small rods come into their own if you find yourself fishing in a little stream with overhanging arch of uncopiced wood, even a 7ft 6 inch rod might be too big !
Think where am I most likely to fish and which species am I fishing for.   Remember right tool for the right job!