The current and future prime minister will be stuck with a coalition that's doomed to fail.
The most notable and most remarkable feature of Israeli Prime Minister Benjamin Netanyahu's current stint atop the government has been that it has lasted this long. Since Yitzhak Shamir's five-and-a-half-year term in office ended with his defeat in July 1992, only Ariel Sharon has served a longer uninterrupted stint as prime minister than Netanyahu. More incredibly, Netanyahu has been prime minister for nearly four years without an intervening election. In contrast, both Shamir and Sharon were re-elected twice during their terms. In fact, in Israeli history only Menachem Begin served a longer stint between elections than has Netanyahu. In some way, the widely mocked "King Bibi" moniker is actually well-deserved.
Stability has been a hallmark of Netanyahu's time in office in ways other than longevity. Israeli prime ministers generally spend time fending off threats from intransigent coalition partners looking to bring down the government if they don't get their way, but Netanyahu has not had to deal with much on this front. Despite presiding over a coalition with diverse interests and a significant secular-religious fault line, Netanyahu's government never faced a real prospect of falling -- and when serious issues arose, he was able to maneuver accordingly.
When the rank and file of the Labor Party decided it was time to leave the coalition due to Netanyahu's right-wing policies, Netanyahu and Labor leader Ehud Barak engineered a move in which Barak quit Labor and formed the Atzmaut Party. The rest of the Labor ministers were then forced to resign from their government posts while Netanyahu kept Barak and his conspirators in the coalition. When arguments over the Tal Law and ultra-Orthodox and Arab exemptions from the military draft became too heated, Netanyahu brought in Kadima to form a unity government and a coalition that would allow him to go in any direction he wanted without fear of the government falling.
When Netanyahu decided to call early elections, he did it because the political timing seemed favorable for him rather than because he was forced to. Despite his term being marked by no significant policy accomplishments or remarkable stances, Netanyahu has achieved a nearly unprecedented degree of governmental stability.
In contrast, the next Netanyahu government, which will almost certainly be the result of today's election, is not only going to be less stable on a daily basis than the previous one, but will also be likely to fall well before Netanyahu's term is up and before he is ready to call another round of elections. The new Israeli government is going to be facing enormous cross-cutting pressures from within its own ranks and from outside the country, and no matter how hard he tries to construct a stable coalition, there will be nothing Netanyahu can do to mitigate this problem. Rather, the coalition choices that Netanyahu makes are going to determine which set of pressures will ultimately bring him down. In essence, Netanyahu will be picking his poison rather than coming up with a cure.