Trying to figure out which stock to buy, or even which mutual fund to invest in, is a full time job. Anything less and you are doing a half-assed job and you would be better off in index funds. By that I mean someone with the appropriate education in finance (formal or street learning) who puts in eight hours a day five days a week, with access to sophisticated tools and data feeds, and who is a little smarter than most, can likely make money at it. Everyone else is a sucker.
There are a LOT more people out there who think they can pick stocks or identify a skilled fund manager than there are people who really can do that.
Hint: Past performance, track record, is a suckers game. The fund companies know this. They keep 10 or so funds on their roster and at any given time one of them will by luck be doing well. So they plug the one that is doing well but guess what? It doesn't do well next year, some other one does, and then they plug that.
There was a study done recently about how the average performance of the stock market means the market should currently be worth hundreds of billions more today than it is--the actual value invested did not increase by the gains! That conundrum was resolved--the different went into brokerage and fund fees, all the dumb monkeys pretending to be stock pickers selling this to buy that pissed a massive chunk of their savings away on trading cost.
I do think there are skilled investors out there. I think there are skilled fund managers. I don't think your odds are very good of figuring out who is one, or of being one yourself. I'm not even sure the really skilled fund managers are working in the mutual fund market, I think they're pension fund managers and private equity guys, since that's where the big bucks are.
MAYBE you could just invest in Berkshire, but then again, Warren's getting old, so who knows if he can keep up the good work for another 10.
Like I said, full time job picking stocks or evaluating fund managers, so, if you are only putting in a few hours a month or less, just stick to index funds. You won't beat the market, but then again, you won't lose to it either. Not a bad result for 5 minutes of effort.