I love to watch from the south side of the rose garden, southwest of the hub. Start from the hub, like you're going to Tomorrowland, but turn right at the little pathway that branches off just before the bridge. You can usually get a good view of both Tink and the fireworks there without having to secure your spot an hour ahead of time. Only minor hitch is that it's not great for sitting down (much better to stand), but the tradeoff is great since there's a fence to lean on and it prevents anyone from squeezing in to stand in front of you. It's great for anyone over three feet tall.