I love 4e because it revived me and my gaming group. I ran an online 2 1/2 year 3.5 campaign and got burnt out. I gave the DMing duties to one of my players, and after 6 more months the game fell apart.
As casual (1 or 2 games per month) players (even though we were all played D&D for over 30 years), 3.5 was too complicated. We kept forgetting what our PCs could do month to month, and we didn't have time to study the rules/books. I took a break from D&D for a year or so, and then when 4e came along, it charged me up.
I love DMing 4e and was able to bring my group back together to play almost weekly for the past 3 months.
In our 4e sessions, we do a ton of roleplaying and combats are exciting. Although the rules are combat centered, I can use the rules to drive the story and the campaign. I love using skill challenges and combats in combination, and my players love killing minions wholesale on occasion.
I just recently subscribed to DDI and have moved my campaign over to VTT. We haven't resumed the games yet, but I love the VTT integration with the monster database and character builder. I'm sure we'll have a blast with it.