I need yet more long-sleeved tops to wear at work. I love button-down shirts, but sometimes it's nice to be a little more comfortable.
McCalls 6435 has been on my list for a while. It has long, short, or 3/4 sleeves (and I see no reason you couldn't turn it into a tank). The bodice either has a sweetheart top with a yoke, or an asymmetrical yoke. You can pretty much mix and match - which means you can use the same pattern a bunch of times without looking like your clothes came from a 5 for $20 sale.
For my first version, I used two poly/ITY knits that were of about the same weight. For the asymmetrical pattern, I think this will minimise weird ripples along the seamline. The nice thing about a pieced pattern like this is that you can essentially use remnants - great for the wallet, and great for the environment.
I didn't use the instructions. Basically you piece the front and back, then sew up the shirt. McCalls has you set in the sleeves after the sides are sewn up... I didn't and wouldn't do that. Setting in sleeves to a knit t-shirt usually ends in ugly shoulder gathers. I suggest sewing in the sleeves flat, then sewing up the side seam all the way to the wrists. This also means you can hem the wrists first, if you don't have a free-arm on your sewing machine.
I think this is a great basic. I didn't make any FBA, despite usually needing one. If I used a more stable knit, I would probably have to. But I'm happy enough with this fit.
Being a knit shirt, it's only a few hours (max) from cutting to finishing.
This is a "highly recommend", my friends, even if Chris does find it reminiscent of a Star Trek costume...