Dash is a nicely aggressive mechanic that has a lot of strategic play to it, letting you play around with enters-the-battlefield and leaves-the-battlefield abilities, as well as protecting your creature against sorcery-speed removal and board wipes
For example, Sidisi, Brood Tyrant and Narset, Enlightened Master are incredibly popular Commanders, the sets tri-lands are staples, and Hardened Scales is one of the best +1/+1 counter payoffs in the game
Love him with toughness pumping equipment like Slagwurm Armor, enchantments like Spidersilk Armor
Its not limited to sorcery speed, either, so you can do this in response to removal to change it into a copy of a Legendary Equipment, sending the original to the yard
Sure, Blooming Marsh, Botanical Sanctum, and Concealed Courtyard are all awesome, but getting those fast Jeskai vibes going with Inspiring Vantage and Spirebluff Canal is where its at for me