for more fun factor I'd recommend going 1/8 buggy.....less maintenance and running cost, less chance of breaking anything and the tyres last you a long time.
1/10 gt cars are more demanding and challenging and also a little more expensive.
When you are good at 1/10 GT cars you will get more thrill over buggy but that is just myself talking , dont want to be shot down by buggy hardcores heh heh
Whatever it is ,practise makes perfect and also need to pay up your practise dues in the form of replacing broken parts due to collisions,bound to happen.