I'm a turtler. That's pretty much how I play any strategy game - just sit back and let my resources build up before I do much of anything. A typical game of Civ 5 involves me putting my only war units on explore while I build wonders and workers. Gold grows, sometimes I get lucky and a settler or a worker or some extra gold comes out of explored ruins, and usually when culture builds up enough I'll take the Liberty path so I get more workers. Using this strategy, and basically by monopolising all the precious resources in my neck of the woods, I'm an economic superpower by the Renaissance Era; there was one game where I was playing as Russia, and I had virtually all the gold and wine veins on the map, and Boudicca kept bugging me about all of it.
Warfare is something I tend to avoid. Because of my turtling and resource hogging, everyone is bound to be against me in the game, so I usually only fight a war when I'm dragged into one by an ally or when they declare war on me. I was playing as England once, in a 4-Civ game, and my only ally was Denmark while Egypt and Siam played the part of the Axis; Denmark was the thirsty one, always getting into wars with Egypt, and Harald was like, "BRUH COME JOIN THE WAR", and I never did until I found out that Denmark - the only Civ in the game that bothered to trade with me - had been reduced to one city, Aarhus, which was the closest to my border. Long story short, I went on a rescue crusade, reduced Siam to only one city while I took their capital and razed the rest, and I think how the war with Egypt ended was I had to use three atom bombs - the first on Memphis, the next on Cairo, and the third on Crocodilopolis, and Ramses decided he needed to cede Memphis and Crocodilopolis to me so he could recover. A wise move, even though Denmark started wrecking his shit shortly after the war was over.
When expanding, I typically stay along the shore if possible. Easier city connections that way. Digging roads outside my borders is a pain in the ass, especially when the workers or legionaries have to stop when another unit is blocking their path. In one case, I was playing as Rome and a route between my capital city and a city I planted in a banana-rich area of the inland jungle, and Indonesia was being a dick about roads and borders. I had my eye on a part of the map that was rich in pearls and had bountiful fishing tiles, and the best place to put a city for this was right on the gulf. Gajah Mada, who had been pissed about my expansion, took this spot and in doing so pissed me off so much that I started a war and reduced Indonesia to that one gulf city; the catch was that this gulf city would be their only city, so I planted so many citadels that I had complete control of the gulf, Indonesia had only a fraction of a hex to their one city, and my borders prevented theirs from expanding and also prevented Indonesia from spawning any units. I was able to build my road, though, so that war was totally necessary.
And downloaded some Steam Workshop items of my interest. Might play it later. 
