balak ko sana computer shop... ok kaya yun...
Simply put, walang "legal" na negosyo ang hindi maganda. Lahat sila maganda at may potential. The only question is the skills, knowledge, and attitude of the "owner/manager" of the business. Do you really love that business? Do you enjoy computers and other related stuffs? Do you have the skills, knowledge, and attitude of that particular business and business in general? Do you have the best location for that business? Do you have enough capital for that business?
At least answer those things, and you'll be able to answer if your computer shop business is a good business.