I know, I know, there are bits and pieces every now and then, but it seems Ancient Persian material culture (at least the obvious parts) is rather lacking compared to the Greek and Roman ones. Everywhere I turn in Turkey, my father's village included, there are ancient Roman ruins and especially lots of ancient Greek ruins. How come there aren't more Persian ruins?
By and large, the material leftovers reflect the people who lived there: the relative scarcity of Persian settlements reflects the simple historical fact that few Persians actually lived in Anatolia.
To clarify: The people we'd consider Persians, as distinct from the Medes or other Iranian people living in the Iranian plateau or its surroundings, are known today as the Achaemenids, after their ruling dynasty.
They acquired power in Anatolia through a string of conquests, annexations, and voluntary accessions through the 6th century BCE. At this time, the population of Anatolia was actually quite high: it was something of a center for civilization; not the barbarian hinterland that Greek historians would later often portray it as.
Most of the people living there were Syro-Hittites, plus some older ethnic groups native solely to Anatolia. Along the coasts, more recent Greek colonization brought many Greek and Macedonian settlers into the region as well. Politically, they were mostly part of the Lydian Kingdom, which ruled most of western Anatolia. In 547/6 BCE, after a series of fairly indecisive battles, Lydia became a satrapy of the Persian Empire.
The Lydians were (barring one revolt, against one particular satrap) henceforth loyal to the Persians; relatively few of them would join in the Ionian revolts that kicked off the Greco-Persian Wars in the next century. At this time, Sardis was the capital of the Satrapy and was a major center, not just in the region but the wider Persian empire.
You do see Persian elements in the ruins of Sardis today; many Persians did settle in the city. But for the most part, it remained a satrapy, not a colony: the people who lived there were generally not Persian. This might have changed, if not for Alexander's conquests coming and leading to a decline in Persian eastern migration.
The major migrations into Anatolia in this time were Greek colonists from the west; thus the greater fraction of Greek (and later Roman) ruins. This would more or less remain the case until the mass migrations of late antiquity, and most obviously today with the coming of Turkish peoples later still.
The best sources for Lydia in the Persian era are Greek; Herodotus himself wrote extensively about the people of western Anatolia. He has his flaws but there's no particular reason to doubt the overview he gives of the places and peoples living there.