Oia earned its reputation. The cave suites carved into the caldera cliff, the private infinity pools that sit directly above a 300-metre drop to the Aegean, the lanes of whitewashed stone that feel like they were built for the specific purpose of being photographed at sunset. All of it is real. The qualification is timing.
Between 10am and 9pm in peak season, Oia is one of the most visited places in the Mediterranean. Cruise ships dock at Athinios in the morning and buses bring their passengers directly to Oia. By midday the main lane is moving slowly in both directions. By 6pm the area near the castle has several hundred people in position for a sunset still two hours away. This is not an exaggeration and it applies specifically to July and August. In May, September, and October the same village is a completely different experience.
For a proposal or honeymoon, Oia is the right area for one specific reason: the best proposal venues and most of the private caldera-edge suites are concentrated here. Staying in Oia means the venue and the accommodation are in the same village. On the evening of a proposal, that matters. You do not want a 30-minute transfer as part of the sequence. You want to walk from the hotel to the terrace and back. For a full comparison of Oia and Fira across every practical dimension, see our dedicated guide.