I dislike slumlords.

Once you put down the down payment it will be very hard to get liquid again even if the property goes up in value as lenders just strongly dislike the self employed.

Call 5 ask them what parts of the city they like/dislike and why.

Call 5 ask them what sides of the city they like/dislike and why.

Call 5 ask them what sides of the city they like/dislike and why.

You already have your own personal likes and dislikes in people, use that as your starting point for the development of your own checklist of what the fit for you should be or feel like. 

I personally dislike using Zillow for small multis.

A couple years ago I changed course and started doing new construction projects, it still is a new kind of exciting and can be very lucrative (maybe possible without changing markets).I have more recently began looking at diversifying income streams - buying a business, investments outside of real estate, etc.Ultimately it comes down to what gets you going, maybe time to bring someone on to handle the items that you dislike? 

The water heaters are in tight crawl spaces which I dislike, it's got swamp coolers which I dislike, and pretty much all the other work that needs doing just doesn't look enjoyable and I'm already too busy.

Besides late paying tenants, what other issues do you dislike or don't really care to deal with as a landlord?