I have been using keysearch.co for years. Is there anything better?
Ahrefs
What things specifically do you look at beyond region and searches per month and competition to find nice keywords?
The ability to further evaluate and/or more accurately assess
keyword difficulty and
relevance based on the organic results for it.
Determining both elements will give me a pretty good idea about how likely it will be for me to rank while targeting that keyword.
How Ahrefs can help with this?
Well, Ahrefs offers a few features that surely help with this process.
Position History
As you can see, this feature will display the volatility of the organic ranking positions for the top results targeting that particular keyword. For me, this graph is more of a "relevance volatility" tab than something else.
The more "steady" the graph is or the least volatile the more sure you can be that Google is more satisfied with the organic results shown for that keyword. So, I wouldn´t deviate too much from what it´s shown on the SERP.
SERP Overview
The SERP Overview is another "must-see" tab for me on Ahregs as I can quickly glance at the SERP and check the top 10 results backlinks profiles and have a much better idea of how hard will it be to actually make it into the top 10 or page 1 of Google.
I don´t get carried away by the keyword difficulty score as I often find keywords with a KD of 40 but, when I look at the SERP Overview tab I see the top 3 results being highly authoritative sites and, the rest are just low-level authority sites I believe will be easy to outrank.
Take that screenshot, for example, that keyword has a KD score of 61 but, if you check the top 2 organic results they both have in total 8.8k backlinks from 1.7k referring domains. That skew the KD scores a lot!
Ahrefs offers shit tons of other features that make keyword research extremely easy.