Collecting pictures is a uniquely personal thing. Most people don't really understand it at all. But for those who do it's a compulsion that never fades. I bought my first 'real' picture when I was 23 for £350 - an amount I couldn't easily afford at the time. It spoke to me and I fell in love with it. I've lived with it for 35 years and I'm still in love with it. And that was how I started collecting. The problem now is that I don't have enough wall space. So selling a few pieces makes sense.
Over the years I suppose my taste has changed - but not all that much. I have always just bought what I liked without over-thinking things. I went to art school when I was 40 ( wonderful since you ask). I can't paint nearly as well as I'd like to but I think I now have a better grasp of what is involved technically in making a painting or a drawing. But even with that knowledge my overall approach to buying art hasn't really altered.
My philosophy is simply to buy what I like. I don't really care whether the artist is well known - though some here are. What I do care about is whether a picture 'sings'. If it does and I can afford to I buy it. And I hope one or two of you out there will do likewise.