If you established your own country..........

[Antonio the Sixth]

Parliamentary democracy, with a President elected by the parliament, having symbolic and (limited) veto powers.

Unicameral parliament if the country is relatively uniform, bicameral if there are really strong regional identities (but with limited powers for the upper house). Full, national and open-list proportional representation for the election of MPs, with a low threshold (2%). If the political scene is really too fragmented, small majority bonus to the winning party/coalition (10% of seats should work fine).

A head of government elected by the main/only hous of parliament, then he appoints ministers without a need for another parliament vote. No-confidence motion must be constructive. The government can present bills for the parliament to vote, but cannot interfere in the voting with tools such as the French 49-3 or things like that.

The judicial is fully independent from the executive, with any important nomination made either by magistrates themselves, or by the President but with the need for a 2/3rds approval by the parliament. A Charter of Rights (comprising social rights such as the right to health, housing, etc) in the constitution clearly defines the principles any law should respect.

[Antonio the Sixth]

Be honest people. You'd take the power.

If I took power, I'll make sure to leave it as soon as possible. That's one of the last jobs I'd want to have.