Yes. Mainly those like True Tears, Onegai Teacher, Onegai Twins, Myself;Yourself, etc. Those anime that have a planned and clear who-to-be-couple from the start. If it doesn't end that way I'll get emotionally unstable for like a week. Funny how it all started with Da Capo ... ya I was so ... dunno how to say.... tens? back then when I watched it.... but I seriously think it all started with Shuffle @ anime, then followed by Kimi ga Nozomu Eien.

Like if in Occult Academy, the main protagonist doesn't fall in love and HOPEFULLY confess and all things end kind of happy between him and Maya ..... I'll have a "heart attack", to say it like that.