I'm a beginner homebrewer. I've brewed 3 beers, one from a Muntons and two from Brewferm brewkits. They were quite good, me and my friends liked them, but each one's taste reminded me a little bit of the taste of wine.
Why is that? Am I doing something wrong during brewing?
Update:
I used 2 Brewferm Gold and one Muntons Premium Bitter brewkits. I used the yeast which came with them. I added as much sugar as their manual said. The fermenter was a Brewferm plastic bucket put in a fridge with which temperature was controlled by a thermostat between 19 and 23°C. I fermented them for about 2 weeks, and they got the wine-like taste immediately before bottling them. The wine-like character is a bit sour, not strong. Definitely not sharp or vinegary. It tastes fine, like beer, but with a little wine-like character which doesn't fade much after 4 weeks in bottles at room temp.