Well, as to the question about the quantum of loan, you may not have too much of a choice. What this means is that different banks have different calculations about the amount of loan they give to you; they may all look at your credit rating, your financial security and your income, and yet come out with different amounts. So you need to find out which bank is giving you the amount of loan that you are looking for.
Interest rates. Interest rates can change the amount of loan during the concept of a loan, and in the past, people have found that even a fixed interest rate loan is subject to some changes by the bank based on the overall changes in interest rates. Shop around for which bank is charging which interest rate, and whether a reduced rate has some conditions associated with it. Further, when the interest rates have dropped in the past, have these banks actually passed on these reduction of interest rates to their customers ? If not, then you should be avoiding such banks.
Customer service. How does the bank behave with you ? You will have to interact with a bank several times over the course of the loan amount, so look for the servicing nature of the bank. Do they treat you with respect and explain things to you without hiding, or do they just give you documents to sign ? Further, do they keep you waiting for a long time, or try to ensure that they have enough staff so that people do not have to wait for long periods ?
Prepayment penalty. I have friends who really don’t like the concept of a loan hanging over their heads for the next 10-15 years, so as and when they get any lump sum, they pay off the loan amount to some extent. If you are like this, then you should check with the loan terms to figure some aspects such as prepayment penalty, processing charges, switching charges (if you find a bank later offering a lower interest rate), etc.
Finally, look for customer reviews on the internet of how banks have behaved with respect to their loan portfolios in the past. You will get an idea of whether a bank is really customer oriented or not.

The callousness of a nationalised bank in preserving the sale deed of a flat has cost the bank Rs 25,000. In a landmark order, the National Consumer Disputes Redressal Commission (NCDRC) directed Bank of Baroda to pay the amount to a Navi Mumbai resident for misplacing the original sale deed of his apartment. Janardhan B Kotian had given the sale deed of his Vashi apartment to Bank of Baroda while procuring the housing loan. “Being an employee of Bank of Baroda, I had applied for a housing loan from my bank itself to buy a Cidco plot. The bank agreed to give housing loan of Rs 2.35 lakh and I raised a loan of Rs 85,000 from HDFC Bank,” Kotian said.
“In November 2000, I wanted to sell the flat. I approached the bank and paid the entire loan amount with interest. I requested the bank to return the original sale deed but the bank said it was not traceable,” Kotian said. He said that though the bank said that they would give an NoC to CIDCO to go ahead with the sale transaction, he did not accept this as the prospective buyer was not inclined to purchase the flat. “I had to refund the advance of Rs 2.5 lakh I had taken from the prospective purchaser and even forced to take some money from a financier at 2% interest to pay him back the amount,” Kotian said.

In this case, what makes it even worse was that the person worked at the same bank; so consider what happened in those cases where the person was just a regular customer of the bank.

Reserve Bank Deputy Governor, Usha Thorat, said abolishing the practice of levying pre-payment penalty on loans could prompt lenders to hike interest rates to pass on their burden to customers. “There is a chance that banks may pass on this burden to customers (if the prepayment penalty is abolished),” Thorat told reporters.
Banks usually impose a penalty in the range of 2-3 per cent on those customers who choose to close their loan amount before maturity. This, bankers said, would impact their interest earnings besides increasing lending risk.