Is it worth having two passports?

[DJFish]

Aside from living out my Jason Bourne fantasies and having a bundle of passports & a pistol under my bed, is there any benefit to my holding an Irish as well as UK passport?

I don't travel that often or work abroad, although that may change in the near future.

My mum's quite happy that I appear to be embracing my heritage but other than that, what are the benefits?

Is it simply a case of getting to pick the shortest queue?

[DJFish]

Well, just as long as I don't have to drink Guinness or do national service.....