By optimizing your meta titles for CTR (click through rates) you will actually end up seeing higher organic search rankings.
Google and other search engines look at the click through rates of your listings and the higher the CTR, the higher your listings will rank in search results.
This can boost the number of clicks you get with higher CTR's but it also allows you to boost your rankings which then adds even more clicks.
With this strategy, you can improve your overall rankings while at the same time, improve your click through rates.
It's a true win/win strategy!
So, go forth and omptimize your meta titles for higher click through rates!