The observation that national political parties in India generally favour centralization, while regional parties advocate for State autonomy, largely holds true and reflects the inherent tensions within India's quasi-federal structure.

National Parties and Centralization:
National parties, irrespective of their ideology, often gravitate towards a strong Centre when in power. Their primary focus is on national unity, integrity, and the implementation of uniform policies across the country. A centralized approach allows for coordinated responses to national challenges (e.g., economic reforms, defence, internal security) and can lead to more efficient resource allocation from a pan-India perspective. Historically, the long dominance of the Congress party, particularly during Indira Gandhi's era, saw significant centralisation of power. Even contemporary national parties, when at the helm, tend to control key financial levers and policy-making, often through centrally sponsored schemes, which, while beneficial, can reduce state discretion.

Regional Parties and State Autonomy:
Regional parties, by their very nature, emerge from and represent distinct regional aspirations, cultural identities, and specific developmental needs. Their core demand is often for greater State autonomy – both fiscal and functional. They argue for a larger share of central taxes, more independent borrowing powers, and greater control over subjects like education, healthcare, and law and order, currently on the Concurrent List or even the Union List. Their contention is that a strong Centre stifles regional growth and diversity, and that decisions made closer to the people are more effective and democratic. Parties like the DMK in Tamil Nadu, Trinamool Congress in West Bengal, and Akali Dal in Punjab have historically championed these causes.

Evolving Dynamics and Nuances:
While the general trend persists, the dynamics are not absolute. The era of coalition governments (mid-1990s to 2014) somewhat blurred these lines, as national parties often had to accommodate regional demands to sustain their governments. Moreover, even national parties, when in opposition or governing states, might adopt postures demanding greater autonomy from the Centre. This reflects a pragmatic adjustment to the political reality where regional forces wield significant influence.

In essence, this dichotomy is a constant feature of Indian federalism, driven by the push-and-pull between the need for national cohesion and the assertion of regional distinctiveness and self-governance.