The internal structure of any planet is the result of its composition, radiation environment and age. Exoplanet interiors are hidden worlds that we are offered a glimpse into via the measurements of the most fundamental planet parameters; radius and mass. With this knowledge, we can distinguish rocky Earth-like planets from gaseous giants. We can look for new types of worlds, not represented in our own planetary neighbourhood, and we can ultimately link this diversity of planets to the underlying formation mechanisms. In this thesis, I summarise the exoplanet systems I have detected, confirmed and characterised with transit photometry and radial velocity measurements. They come from a whelm of ground and space-based transit surveys, all focusing on bright stars. I will describe the vetting and screening which lay the foundation for robust detections and stress the importance of identifying false positives.