Can't be bothered
I've always voted but, really, exactly how does that vote mean I have a say? Ignoring the fact I've never voted for a winner, how can one vote possibly reflect my opinions and views over the following 4/5yr period? How does that vote stand against 'the whip'/the party line? Does that vote mean I support my country going to war, or constantly spies on me? Does it mean I want 3000+ new criminal offences on the books? No it does not.
Should my vote 'count' on the day where an MP may be elected because of it or not; it does not count for anything the day after. Voting is a mass delusion we all accept, a lie we tell ourselves, just like money. At least my money matters.