Claiming Year to Date Tax Back ... any reason not to?

I finished in my employment a couple of months ago and spoke to Revenue about claiming tax back. We are jointly assessed and the 2 options I have are to either claim my tax back or transfer credits to spouse. Just wondering whether one of these options is better than the other? I do hope to find another job ASAP but in the current climate have to accept that this may take some time. {I have Revenue Form P50}