I've become totally a Marvel-girl as well - although I'm still also totally a DC-girl. And a Valiant-girl too! But who's counting.
Anywayz, while I may not know the perfect entry point, since I've only been a Marvel girl for like a year or so, I can and will recommend the storyline / event / crossover that I started with - and that got me hooked to several Marvel comics ever since: the Fear Itself event
Hmm, it seems I tend to use major crossover events as entry points, since Blackest Night was my introduction to DC.
I guess that's because a major event introduces you to 10-20 comics series at once, helping you to decide which characters you like by tasting the tie-ins, while enjoying the "main course" of the meal that is formed by the main storyline.
But again: anywayz.
With Fear Itself, I'd suggest you read at least the Fear Itself comics (7 issues) and the Avengers, New Avengers, Invincible Iron Man and Journey into Mystery tie-ins. The Invincible Iron Man tie-in issues are hilarious, as are the Journey into Mystery ones, which focus mainly on Loki. Ah, just writing about them now make me want to dive into those TPBs once more! And like you, I hadn't read any of these comics before, just dived right into the event.
If you want me to, I can post a reading order for all of the 122 issues I read (which is still not the complete event by the way), which is the order I found most fruitful.
Another good entry point into the Marvel Universe would be the Marvel Now
reboot/relaunch/reimaging (take your pick). Marvel started all of its comics series anew, with all new #1 series. (Soooo copied from DC's New 52).
I have to say I'm totally into Jonathan Hickman's Marvel Now Avengers, New Avengers and, later on, his Infinity crossover event. Also, Captain America, great read, as well as Iron Man, and, surprisingly good, Incredible Hulk. And many more.
A definite, definite, recommendation is The Superior Spider-man. Perfect entry point, for I NEVER read any Spider-Man like, at all - and I understood everything in it! It's great great writing, hilarious too imho, with enough flashbacks for new readers to understand crucial events from the previous series. Another plus: only 31 issues from start to finish, and the last one has recently been published so you can buy the entire series and BINGEread it (yea!) - which I have. That series has sooooo been worth my money! And unexpectedly too, since up until now I didn't like Spidey very much.
But, I'm going to review this series soon on my blog and will send you a Spirit Blade Underground podcast entry
My gosh, I'll stop now, I'm practically drooling...
(On the other hand, I am Comi
Hope this helps!