The internet browsing experience with the Evo is much better than any mobile browsing I've ever used that I'm on it almost constantly. The pages load so fast -- on Winmo, the best browsing experience was with Opera Mini, and that was still a buggy affair full of crashes and and restarts. If you're on wifi or a fast 3G network, the Evo almost like a small laptop.
I'm also taking tons of pictures and video of my daughters. I've taken more pictures in the first week of ownership than I did the entire three year stretch of Mogul/Diamond/TP2. It's the first "camera phone" that approaches the quality of my point and shoot.
And between the roomy keyboard and the voice input, I'm composing a lot more than I used to. The TP2 had a slider, but because the portrait to landscape transition was so buggy I avoided using it when I could. On the Evo, I readily switch from portrait to landscape and back.
My wife is cutting me some slack right now because it's so new, but if I don't start putting it down for more than five minutes at a time, she's gonna get a bit upset.