Thanks for the advice guys. Perhaps in another 20 years I'll be more suited to the wooden steering wheel effect. For now though, I think leather is best.
It's a very subjective issue of course. Personally, I find the wooden wheel a bit too slippery and when your palms get sweaty, it's not the best surface to be gripping tightly.
More than anything though, it's the look. I've now ordered a titanium console and leather/titaium gearknob, so the wooden wheel has to go.
I can get a new leather 156 steering wheel from Alfa for £160 (without airbag) so hopefully I (or someone more experienced) can change the airbag over for me.
If anyone's interested in the wooden wheel (minus airbag) feel free to email me. (email@example.com).
Same with the wooden centre console and gearknob. They will be removed very very carefully, so if anyone's after a complete wood pack (it's lovely really !!!) please email me.
Mak, thanks for your message. Not sure about fitment on your car. If you email me, I can email you back. I used to have a 155, which I've now replaced with a 156 - hence the confusion with my profile.