Credit where credit is due, we all have Eccleston to thank for coming aboard in that first new season 15 years ago and getting the modern-day run of Doctor Who off the ground. But with just one season under his belt before he moved on, and a desire to avoid the eccentricities and flamboyance that made the Doctor such a beloved character prior to his arrival, it never felt like that great of a fit.
As the Twelfth Doctor, Capaldi was only around for three seasons. And in that time, his brusque approach to the character always kept him feeling just out of reach and hard to really fall in love with, especially when compared to the two Doctors he followed. We'd be lying if we said we were all that broken up when he decided to move on in 2017.
As our current Doctor--and Thirteenth overall--Whittaker has brought some much needed gender diversity to the habitually regenerating Gallifreyan's many visages. Following Capaldi's more nuanced approach, she's brought some whimsy and much-needed humanity back to the character. (Yes, we're aware they're an alien.) She's a breath of fresh air and well on her way to becoming one of the all-time greats.
Joining the franchise in 2010 at the Eleventh Doctor, Smith was the youngest actor to ever portray the character. (He was just 26 at the time.) As such, producers had fun contrasting the character's world-weariness against the actor's youthful appearance. There was an energy and a playfulness to Smith's approach to the character, which, in some ways, made him not all that dissimilar from his predecessor. Not that that's a bad thing--his adventures with Amy Pond (Karen Gillan), Rory (Arthur Darvill) and River Song (Alex Kingston) over the course of his three seasons are some of our all-time faves--but if we're splitting hairs (and we totally are), the other guy did it first.
As the Tenth Doctor, Tennant set the gold standard, the approach that all others would ultimately be compared to. His Doctor was so charismatic and charming, you couldn't help but fall in love with him. It's no wonder Matt Smith's version felt so similar. Why mess with a good thing? Tennant was only around for three seasons, no longer than anyone else on this list, and yet it feels like we had much more time with him than that. He was that good.