I had the same issue very recently. But in my case I went down the semi realism path because I wanted my style to have influences of realism, I hate pointy chins and huge bug eyes. All I could really say is look at series which have an art style you want to emulate. It might take a little bit to get back into the flow of anime but you'll get there soon enough, don't worry.
Oh my, well, i havnt actually found my own art style (I wind up drawing fan-art most of the time and i try to stick to that particular style while drawing fan art) so drawing precise 'anime' style is difficult. As there's the awkwardly pointy style that would generalized in Cowboy Bebop (though its a mixture of pointy and round, dem pointy chins) and i suppose Panty and Stocking is the best example for Rounded, since almost everything there is round. I guess the best way to get back into the 'style' is to pick an anime whose style you like, look at one of the characters, and simply draw the face shapes. and eyes? Pffft there are like a gazillion different eyes you can draw for anime. Eyes the size of dinner plates, just black dots, manly with eyelashes, round, sharp, wide, small, boxy, triangles. Eyes are for you to decide.
Japanese cartoons, exactly. The art of cartooning is a global thing. You deliberatively simplify details for a desired effect. The differences are regional but not as rigid or as insular as you might think.