I cried within the first 30 seconds of the movie. I cried again a few times into the movie, and at the end.
If you're thinking about watching Inside Out (which was recently released in the UK), just do it. It doesn't matter if you're male or female, 5 or 50, I can guarantee you're going to like it. It's no secret Disney and Pixar make amazing collaborations, but some may be hesitant to watch Inside Out because if you've seen the trailer you would know it's quite different from everything you've seen before.
Inside Out takes you into the mind of 11 year old Riley, a girl who has just moved to San Francisco. You get to see how her thought process works and how her brain makes connections with the help of five little (and adorable) characters: her emotions. Joy, Sadness, Fear, Anger, and Disgust will make you feel like a kid again.
I couldn't help but love the characters from the start, especially Joy, Sadness, and Disgust because they're voiced by Amy Poehler, Phyllis Smith, and Mindy Kaling, respectivly. I think those three women are hilarious and their voices made the movie even better for me. It had many funny moments, even some made for the adult audience.
I was worried it wouldn't have a consistent plot and it would feel long but I was proven wrong. It doesn't have a complicated plot, it's even simpler than your usual "movie for kids" because of the nature of the characters and how different it is. I was also concerned about how the "going in and out of the mind of Riley" would work but, again, if felt quite easy and natural. If the plot would have been any more complex, I don't think it would have worked as well. Still, I really like the psychological aspect and the introduction of different characters and parts of one's mind.
I will say this again: if you have doubts, don't. Just go watch it and you'll fall in love with it.
(ps. You get to see the Pixar short 'Lava' right before the movie, which is really good as well.)