If you have to ask that question, then a base model truck may not be for you. Only you know which features you want in a vehicle. Once you make that list, then you can narrow down the trims that fit your needs and land on the best option. New base model trucks (especially crew cabs) have features equivalent to a mid-level trim from 10 years ago. Feature creep makes it easy to buy more equipment than you really care about in a new vehicle, especially if you continue to trade-up for the same trim level each time.
I drive a F150 STX, and it suits my wants almost perfectly. It had all of the features I was looking for that are expensive or difficult to add, and I filled in the gaps myself with easy to add accessories. For me, a vehicle must have power windows, mirrors, and locks, tilt and cruise, factory dark tint rear windows, alloy wheels, remote entry, and sufficient interior storage (console, storage armrest, underseat storage, etc). For the truck, I also wanted 4WD, locking differential, towing package, skid plates, and extended range fuel tank (36 gal). I don't care about driving nannies (lane keep assist, adaptive cruise control, etc) and do not want sensors in the bumpers. Many mid-level trims come with these features as "standard" in their equipment groups. I got all of that except the skid plates, which I added myself with a combination of OEM take-off engine, transfer case, and fuel tank plates and an RCI transmission skid plate. Rubber floors would've been nice instead of carpet - I bought rubber floor liners to cover all of the carpet, front and rear. I'm indifferent toward the color matched bumpers - I would have preferred chrome to ward off scratches, or plain black painted to make repainting easier (no color matching) when they're chipped and scratched enough to need it.
The trucks I had prior to this F150 STX were: 2014 GMC Sierra SLE, 2007 Nissan Titan SE, and a 2005 F150 XLT. They were all mid-level trims, and this STX has everything (and more) that those trucks had, except for a power driver's seat and the pretty aluminum trim on the GMC dash. The only feature I really miss from that "nicer" GMC are the corner bumper steps.