Thanks for all the comments guys, whichever side of the fence you are.
I do use my bikes a lot (the recent bad weather is easily the longest I've been off them for the last few years) - my commuter in particular. It's an old frame but with a lot of new-ish components, which is why I feel bound to make some effort to keep it up to scratch. I suppose the upside, as has been said, is that the likelihood of it letting me down is lessened, particularly in the case of developing faults that could be spotted.
I think - seriously - a bigger and better shed might help a bit. It's such a tight squeeze in there with me and 2 bikes. If I had more room to move around the bike, it might seem less of a pain. No room in the house to do this sort of stuff and we don't have a garage. Checking the tyres over is probably the one thing I wish it was easier to do, especially in winter.