My first batch was also mediocre, but my friends loved it. It also got much better with some age.
May I suggest that your next batch be a type of beer you like, or even better, a clone of a beer you love. You get to see how you compare, and it's a beer you know you will want to drink.
My favorite I do so far is a noble pils clone, I actually like mine slightly better!
Just google clone recipes if you can't find a kit, the process is still the same, but you put the ingredients together yourself.