Like others here have stated, James Bond was that marketing component that got me to look at Omega.
Brosnan-era: man, 007's watch can do some cool stuff!
Craig-era (up until Spectre): man, 007 is such a bad-ass. Vesper surmises that Bond would wear a Rolex, and cold as stone he retorts "Omega".
The value proposition (pre-owned and grey market) for Omega watches offers by far (IMO) the best price-to-performance ratio of any "luxury" watch brand. I feel it's a great brand to get one's feet wet without breaking the bank.
As for me...I'm now drifting towards the Rolex camp (but have yet to purchase my first...yet.).