Is it normal having a tendency to dwell on the negative?

It's hard for me to let negative stuff go too. Like, a customer can compliment me at work, and then another one will be totally rude for no reason, and I'll think about that the rest of the day and totally forget the compliment. Life is too short though to let some jerk ruin an entire day for us. It's not worth 5 minutes of our time. It takes practice to start focusing on the positive things instead, and good luck with it =)

I think it is normal because the positive is like money in the bank and we pay little attention but negative is like loosing something and we worry and search and miss it.

It is normal as long as it doesn't take over your life. In my case it did, as a kid I used to tell myself I'm worthless and nothing good will ever happen to me and that nobody cares. As a teenager I stayed in my room alone most of the time, I cried myself to sleep most nights. I had a therapist tell me once that this was called negative programming, I basically taught myself to only think of the negative things, I could never accept a compliment and I always found a way to convince myself that anything bad was my fault. It may have been post traumatic stress or whatever but I got help and now I really enjoy finding inspirational things, I've learned to ignore negative things and focus on positive. Okay so you didn't need to hear my whole crazy story but the point is there is a lot of power in positive thinking and there is no point in focusing on the negatives.

I used to be this way (sometimes I still think about it), then one day I woke up and realized that it had become my entire life up to that point and I didn't want to live like that anymore, so I started doing things that I enjoy doing everyday, and soon I noticed I wasn't concentrating on the negative anymore, instead I started seeing the positive in life and the possibilities of things yet to come. I hope that I've helped in some way, good luck to you.

there's nothing wrong with this. not everyone can be a happy go lucky smiling life is wonderful freak all the time. the world needs negative downers too otherwise people wouldn't appreciate their happiness. embrace your love for these negative feelings in life.

yes it is pessimism and off course there is a way around it but i'm not gonna tell ya =D