I allways use liberty in my games (immortal), because I find it most fun.
I don't think it's fun placing 4 cities and then go all in science.
I think it's much more awesome settling your homeland with 3-6 cities and then go exploring for new territory to settle, ending up with . It's amazing when you find that sweet spot overseas with iron, horses and 1 luxury, easily defended by sea (ofc you have a solid navy as a seafaring empire
)
That's why I mostly play civs like Portugal, Indonesia, Byzantium, Carthage and other civs favouring seabased empires.
Settling a new island allways raises curtain questions:
- Will it get some production later to compensate with happiness hit from building it?
- Will it be able to produce ships for late navy superiority?
- Does it provide important luxuries for selling, keeping?
- Does it provide strategic resources usefull now or later? (Iron gets VERY important when you want that frigate navy)
- Will it upset close nabors and risk war?
- Is the placement strategically good for late navy/air base or invasions? Or perhaps defence?
- Will it be a important island for late expansion?
- Will it open lucrative trade routes to friendly civs?
- Is it positive for my religion? (1 more city to build religious buildings)
- Is it very vulnurable to enemy attacks? (building nice cities close to aggressive enemies may cause them to attack you)
Hope it helps