Hi Liz,
I used the Boots personal radio for a while. Very nice sound and good reception but it had a rotary tuning dial and this made it difficult to tune exactly and it used to move when in my pocket!
I then bought a very cheap (£2-£3) radio that had a push button for tuning. This scans until it finds a strong signal and then stops. If you don't want that station then you press it agan and it scans up until it finds another station. The button is quite small and doesn't get pressed when in my pocket. I wasn't expecting miracles from it as it was so cheap (and small) but I am still using it after 2 1/2 years!
So I would buy one with scan type tuning and not a rotary knob for tuning. If you don't have pockets then it must be comfortable to hold and waterproof (perhaps).