Tinstaafl mentioned the Grumman AA5 - I'm currently learning in one of those and it took me AGES to get the hang of taxiing. Once I'm on the taxiway I'm OK now, but the number of times I nearly went off when taxiing to the hold was ridiculous.
Training planes at Biggin are usually parked up on a bunch of paving slabs set in the ground off a small taxiway. Trying to park when the ground is wet and muddy and your wheels just slide is a b'stard. Next time it's like that I get out and push...