Since you are a taller person, we would recommend you look at the Yamaha XSR155 instead of the MT-15 as the XSR is a more spacious machine which will be useful to you. For a similar price, you will also get larger machines like the Bajaj Pulsar N250, TVS Apache RTR 200 4V and Honda CB300F. It will offer you better performance at the expense of a small hit as far as fuel efficiency is concerned. 

Since you have mentioned that you are considering the Honda CB350 models. Do bear in mind that these are relaxed neo-retro roadsters which will offer you a more laidback riding experience and good comfort levels. Although fuel economy will be quite a bit lower than that of the smaller bikes we have mentioned above. It is also worth taking a look at the Royal Enfield Hunter 350 because it offers a similar experience to the CB350 but at a lower price and has comparable fuel economy and performance, too. 

A test ride of every bike you shortlist will help you make a decision. 

The Hero Xtreme 160R 4V is a sporty commuter which has a feature no other competitor in the segment does - cruise control. It has a reasonably peppy and smooth engine, good suspension and is quite a comfortable machine overall, even for taller people. It will also return good fuel economy, and Hero machines are generally known to be affordable to own and maintain. It is also quite a bit more affordable than the XSR155, so if your budget is tight, then it makes for a good option to consider.

Coming to the Yamaha XSR155, this is a far more modern machine in terms of its engine architecture and its chassis design, using proven fundamentals from the R15 in a neo-retro package. The XSR is sure to be the quicker, better-handling machine while also returning comparable fuel economy to the Xtreme. Yamaha's aren't known to be expensive to live with either, but since the XSR has a more complex powertrain, its running costs could be a little higher than the simpler Hero. 

Both are different machines from distinct segments, so we would urge you to go get a test ride of them so you can make an informed decision. 

The Kawasaki Ninja 500 - while priced very high for what it is - is a sweet, capable and in true Japanese fashion. It is a machine that is likely to be reliable and last you for years without giving significant issues, provided you maintain it correctly. 

You could also take a look at the Yamaha R3, although most dealers we have spoken to in major metro cities have informed us that they don't have any stock, nor are they expecting a new shipment anytime soon. 

Its best to speak to your nearest authorised Yamaha dealer and see what the situation in your area is like. The R3 is a rather simple machine with no frilly features. But it packs a potent engine and chassis, and it has also cemented its reputation for reliability in our market. 

The Kawasaki Z650 and Ninja 650 are the only reliable big bike options below the 10 lakh rupee mark from a reputed make. Also, you'll have to considerably extend your budget for anything else. Should you be able to do so, bikes like the Suzuki GSX-8R and Honda CB750 Hornet will be the next stepping stones. 

Try to take a test ride of these machines to see which one suits you best before you make a decision. 

Since you are dissatisfied with TVS' aftersales experience, we would recommend you take a look at scooters from Japanese brands. 

Options like the Suzuki Access, Honda Activa 110 / 125 and Yamaha RayZR / Fascino Hybrid models have cemented their reputation for reliability, easy spare parts availability (especially so for the Activa and Access) and low running costs. 

These scooters are also comfortable, practical and quite fuel efficient, so picking between them will boil down to which one you prefer personally. A test ride of all these should help you make a decision. 

The Harley-Davidson X440 will be a good starting point for a novice rider, although you will take some time to get used to its weight. Since you are shopping in this class of bike, other options to consider are Royal Enfield Hunter 350, Honda CB350 trio and the TVS Ronin. Of these, the Ronin will be the lightest and one of the most affordable options while still delivering comparable performance to the 350s. 

The Yamaha Aerox 155 is a good scooter in many ways, but its stiff rear suspension and cramped ergonomics for taller riders are two big reasons we would steer you away from it. If you do want a large-capacity scooter, then the TVS Ntorq 150 is our current pick because it has engaging performance but doesn't sacrifice comfort or practicality. 

Take a test ride of everything you consider, which will help you decide if you're ready to get into bikes or should stick with a scooter. 

Since you have had a bad experience with TVS recently, we'll recommend you take a look at the Suzuki Access, Honda Activa 110 / 125 models and the Yamaha Fascino / RayZR Hybrid. These Japanese scooters have an excellent reputation for reliability and are generally uncomplicated and inexpensive to service. 

We must mention that the current TVS Jupiter 110 / 125 are some of the most well-rounded scooters in our opinion, and should you be willing to look past your bad experience, these should serve you well. 

A test ride of all these options, as well as a chat with the service manager for these scooters. It will help paint a clearer picture and help you make an informed decision.