I own an share in a PA28 and think it's a lovely touring aeroplane (okay, boring in it's own way), but IMHO the C152 is a perfectly good trainer - learn on what's cheapest if it's good enough. If you want to fly a PA28 (or anything else) later as a qualified pilot you'll only be looking at a couple of hours conversion anyway.
There is an ongoing debate of high-wing versus low-wing. Basically the high wing (C152) will give you a better view down but poorer into turns, the low wing (PA28) will give you a much better view into turns but very poor downards. Neither is perfect, but both are "good enough".
Overall the C152 is probably the better from this viewpoint, because it's got a lovely window in the back that allows you to see clearly behind - something sadly lacking in the PA28. (Then again, the Cessna is slower than many modern microlights, so it needs it
).
G