Bundesliga stats from SoccerSTATS:
Season Goals per match Games with over 2.5 goals
2015/2016 2.83 55.9%
2016/2017 2.87 54.9%
2017/2018 2.79 52.0%
2018/2019 3.18 62.4%
It probably doesn't make any sense at all from a statistical point of view tbh. I don't put too much emphasis on statistics normally though; more going with what I see on the pitch and doing my own analysis. There is teams that are under teams in my book, but have been overish a lot this season, so I expect these teams to slow down with the overs and get to 50/50 with over/under.
These teams are: Mainz, Hertha, Freiburg, Köln, Augsburg, Düsseldorf, Schalke, Paderborn (Paderborn is over-team normally, but don't belong in GER1 quality-wise). Frankfurt is 9-1, Dortmund 9-2, Leipzg 8-3 - a bit too much as well, so expect them to go maybe 50/50 from now on.
So, thats already 60% of teams for which I expect a more underish tendency in the upcoming weeks. Now I could just pick the games with these teams involved, but it's only a few games, where one of these teams is not involved, so why not play them all.
I am only using tiny stakes here to get used to playing unders, since I think there is often value in under odds as I explained in the opening post. Till now, can't say that I was very successful. Probably poor pick selection, maybe just bad timing, who knows. But to get a feel for it, this has been very valuable so far for me. I didn't expect to make huge gains right from the get-go. The positive things is, that I am more relaxed now, when watching a football match and having a bet on the under. So this is already an improvement But could also get worse again when I start to stake more on unders