Genetics of any marijuana plant are real important. If you start with shit seeds, no matter what you feed them & no matter how much light they have - you are going to hit the wall. Every plant has a predetermined potential. The better breed plants - grow with repeatable results, and have tailored traits which set them apart from other plants.
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I Love Sativa's - most people don't like growing them - cause they get tall and their buds don't fill out as fast as shorter plants (indicas). With most Sativas, you need a full extra month of growing for them to finish properly (buds filled out - to nug status).
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Skunk # 1 is a real good compromise, it is a proven cross, with all the nice up high characteristics of Sativas with the shorter, faster traits of Indicas. Plus every seedbank carries them - they are cheap - but an excellent plant. So, if you're on a budget & want a medium sized plant with Sativa traits - get some Skunk # 1 seeds. For less than $ 30, they are a deal.
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Hope this helps....
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