I would suggest restarting if you are going to play a femshep. Play through all three games, great experience.
Agreed. But I disagree about Hale - I actually much prefer Mark Meer's Shepard - the sarcastic responses throughout the games just seem to work better with his voice (particularly with the Citadel DLC for 3). (also because of "We'll bang, okay?")
For some reason, whenever I play femshep, they always end up being a Vanguard. You know, because spamming Biotic Charge/Nova is awesome.
And Garrus > any other romance option because he's fucking hilarious.
Kaidan gets really boring in ME3. I suppose Ashley does to a point as well, but he annoys me more.
Don't do a solely Renegade playthrough. It's funny for a while but ultimately it will break your soul. Full Paragon can seem boring, but the payoff at the end of 3 is worth it.
Then again, it doesn't matter how you play, so long as you've experienced the joy that is the ME3 multiplayer. (Volus Engineer ftw)