Definitely think about your budget, because flying rotary costs about the same as flying a twin.
But also think about the type of flying you want to do. I started on fixed wing microlights then went group A(sep), B(multi), IMC and Night, then Rotary.
Microlight great for Club atmosphere and cheap flying. Sep good for touring, although modern microlights are just as good if only 2 up.
Twin better for IMC, night and serious touring abroad.
Rotary good for sheer pleasure and ability to land at the actual destination if going to a country hotel or golf club etc. Not so good for long distance touring due to range and speed.
Flying wise, flying microlights helped me change to rotary as you have to fly them all of the time whereas with fixed wing you can trim or autopilot and get out the flask and sandwiches.
Depends what you want to do for your money, but rotary far more satisfying challenging and expensive.