Yeah I'm a vegetarian...have been for 5 years (since I was 11). I was never really a big meat fan so I didn't have any trouble adjusting...but my parents did!!!
I don't eat seafood, or anything that has had something that was alive in it (so nothing with gelatine or anything (eg marshmallows)), I don't like eggs or milk but don't mind if it is cooked in something, as long as I can't taste or see it. I have vegetarian cheese, and not most types of yoghurt because it has gelatine in it. I don't really 'plan' my meals, I just eat what the rest of my family does, minus the above list. Which explains why I now have to have iron supplements for the rest of my life
I now buy things like vegetarian patties when my family has burgers and stuff, I don't feel like I'm missing out on anything.