Another question about tipping

Would like some feedback on this scenerio: Played some green my final night in Vegas on my last trip. Bought in for $300 and ended up cashing out for $1015. I believe I played for about two and a half hours, and during this time, I was the only person at the table who was tipping the dealer(s). Instead of straight tipping them, I would normally just put a chip out front for them, and I won the majority of the time I did this. When I colored up, I just gave the dealer the $15 and kept the big chip. Granted, there's no "wrong" way to tip, but should I have given the dealer more when I cashed out? I'd estimate I tipped somewhere around $150-200 while playing, doubling up for the dealer.