Modern is one of Magic: The Gatherings most exciting formats, pulling some of the best cards the game has to offer all in one format, without the baggage that other Eternal formats bring (looking at you Legacy and your Dual Lands)
This is obviously great for limiting the power of a deck, too, and it might let you play a powerful commander in a more enjoyable way for casual games
If an opponent plays a card like Day of Judgement or Supreme Verdict a turn or two after you play you have established a big board presence, it can really set you back
Its difficult to fully articulate why Black Lotus is so important to the history of this great game
The new card Destiny Spinner is particularly nice since it only costs two mana, has a decent-sized body, protects your creature and enchantment spells from being countered, and is itself an enchantment