Both the types have its own advantages and Drawbacks.
Semi Automatic Machines are cost effective, simple but about 30 percent of the job we've to do manually like water filling, turning drain knob ON, Taking out the clothes from wash tub and putting into spin tub.
Fully Automatic does everything on its own. It takes the water on its own, washes, rinses,Spins.. Everything will be automatic. So till the washing gets over, we can do some other tasks.
But there are people who are not patient enough till the process gets over( Having used semi automatic before, Now they say that it takes longer time).
If you were using Fully Automatic, Don't go for Semi automatic now. Then you'll feel as if you have to be behind the washing Machine.
If you are a new buyer consider the cost factor, family size etc.,
Which is better Front loading or top Loading?
Both Top Loading and Front loading Machines its own advantage and drawbacks
Front Loading machine consumes less water and less detergent; It has in built water heater also. But It takes such a long time for one complete cycle. In between if you want to add clothes, It's not possible.If there is a problem of water supply in your tap, you may not be able to pour water and wash.Front loading machines are heavier(to move or transport) and consumes more electricity.
Top Loading Machines consume less Electricity, Highly User Friendly; You can add clothes or detergent in between. The drawback is It consumes more water and detergent. Most of the Top loading washing Machines don't hve In-Built Heater.
Considering all the above advantages and drawbacks you can decide upon.