Sb1089,
Do the IMC rating, it's useful and sharpens up your flying.
Also join the PFA and sample the delights of flying vintage taildraggers and other interesting types. It can be a lot cheaper than renting club aeroplanes plus it's lots of fun. A visit to the PFA Rally will show you what you can get outside the world of Messers Piper and Cessna. Have a look at their website on PFA.org.uk (I think).
Alternatively, as I'm sure Genghis will agree, the current generation of "microlights" make a C152 look pretty dated, thirsty and slow.